CN114174145B

CN114174145B - Work machine

Info

Publication number: CN114174145B
Application number: CN202080054284.6A
Authority: CN
Inventors: 梨本知伸; 岛尻匡章
Original assignee: Makita Corp
Current assignee: Makita Corp
Priority date: 2019-08-08
Filing date: 2020-07-10
Publication date: 2023-10-13
Anticipated expiration: 2040-07-10
Also published as: WO2021024705A1; CN114174145A; US12103579B2; JPWO2021024705A1; US20220410956A1; JP7203984B2; DE112020003759T5

Abstract

The work machine may include: a battery box; and a battery detachably attached to the battery box. The battery box may include: a top cover; and a battery cover having a shape covering the battery mounted to the battery box and being rotatable about the rotation axis with respect to the top cover. The battery cover and the top cover may be at least partially overlapped when the battery case is viewed from above in an open state in which the battery cover is opened. The battery cover and the top cover may be at least partially overlapped when the battery case is viewed from above in a closed state in which the battery cover is closed.

Description

Work machine

Technical Field

The technology disclosed in this specification relates to a work machine.

Background

Japanese patent application laid-open No. 2018-122688 discloses a work machine. The work machine includes: a battery box; and a battery detachably attached to the battery box. The battery box includes: a top cover; and a battery cover having a shape covering the battery mounted to the battery box and rotatable about a rotation axis with respect to the top cover.

Disclosure of Invention

Problems to be solved by the invention

For example, when working machines are used outdoors in rainy days, water may be sprayed from above onto the battery box. In the working machine of japanese patent application laid-open No. 2018-122688, even when water is sprayed onto the battery box from above, water can be prevented from being sprayed onto the battery as long as the battery cover is in a closed state. However, if water is poured onto the battery case from above in a state where the battery cover is opened, water may be poured onto the battery. In the present specification, a technique is provided that can prevent water from being sprayed onto a battery even when water is sprayed onto a battery box from above in a state where a battery cover is opened.

Solution for solving the problem

The work machine disclosed in the present specification may include: a battery box; and a battery detachably attached to the battery box. The battery box may include: a top cover; and a battery cover having a shape covering the battery mounted to the battery box and rotatable about a rotation axis with respect to the top cover. In the working machine, the battery cover and the top cover may be at least partially overlapped when the battery case is viewed from above in an open state in which the battery cover is opened. In the working machine, the battery cover and the top cover may overlap at least partially when the battery case is viewed from above in a closed state in which the battery cover is closed.

According to the above configuration, the battery cover and the top cover partially overlap when the battery case is viewed from above, regardless of whether the battery cover is in an open state or a closed state, and therefore, even when water is sprayed onto the battery case from above, water can be prevented from entering from the gap between the battery cover and the top cover. It is possible to prevent water from being sprayed onto the battery mounted in the battery box.

Drawings

Fig. 1 is a perspective view of the chassis unit 4 of the embodiment as seen from the front right upper side.

Fig. 2 is an exploded perspective view of the handle bar unit 6 of the embodiment.

Fig. 3 is a perspective view of the handle bar base 16 of the embodiment as viewed from the front right upper side.

Fig. 4 is a perspective view of the handle bar base 16 of the embodiment as viewed from the rear left upper side.

Fig. 5 is a perspective view of the right handlebar 18 of the embodiment, as viewed from the rear left upper side.

Fig. 6 is a perspective view of the left side handlebar 20 of the embodiment as viewed from the rear upper left.

Fig. 7 is a perspective view of the right and left handlebars 18, 20 of the chassis unit 4 of the embodiment, as viewed from the front upper right, fixed in the highest position.

Fig. 8 is a side view of the internal configuration of the switch box 40 of the embodiment as seen from the right.

Fig. 9 is a side view of the internal structure of the switch box 40 of the embodiment, as viewed from the right, in a state in which the safety lever 42 is pushed in downward and the operation lever 72 is pushed in upward.

Fig. 10 is a rear view of the chassis unit 4 of the embodiment as seen from the rear.

Fig. 11 is a perspective view of the positional relationship of the safety lever 42, the 1 st link member 84, and the pipe 34 of the embodiment as viewed from the front right upper side.

Fig. 12 is a perspective view of the battery box 8 of the embodiment as seen from the rear upper right.

Fig. 13 is a perspective view of the battery box 8 of the embodiment as seen from the front left upper side.

Fig. 14 is a longitudinal sectional view of the battery box 8 of the embodiment.

Fig. 15 is a perspective view of the battery cover 106 of the battery box 8 of the embodiment viewed from the rear upper right in an opened state.

Fig. 16 is a longitudinal sectional view of the battery case 8 of the embodiment in a state where the battery cover 106 is opened.

Fig. 17 is a top view of the front wheel unit 12 of the embodiment as viewed from above.

Fig. 18 is a perspective view of a brake balancer 148 of the embodiment viewed from the rear upper right.

Fig. 19 is a top view of brake balancer 148 of the embodiment viewed from above.

Fig. 20 is a plan view of the brake balancer 148 of the embodiment viewed from above, in a state in which the brake lever 49 is pushed up.

Fig. 21 is a cross-sectional view of the motor 150 and gear box 152 of the embodiment.

Fig. 22 is a cross-sectional view of the motor 150 and the clutch lever 210 of the gear case 152 of the embodiment in a pulled-up state.

Fig. 23 is a perspective view of the safety brake 154 of the embodiment as viewed from the front right upper side.

Fig. 24 is a perspective view of the rear wheel unit 14 of the embodiment as viewed from the front right upper side.

Fig. 25 is a front view of the rear wheel unit 14 of the embodiment as seen from the front.

Fig. 26 is a side view of the rear wheel unit 14 of the embodiment as seen from the right.

Fig. 27 is a longitudinal sectional view of the center pin 230, top plate 232, bracket 234 and locking mechanism 240 of the right caster 226 of the embodiment.

Fig. 28 is a longitudinal cross-sectional view of bracket 234, axle 236, and right rear wheel 238 of right caster 226 of the embodiment.

Fig. 29 is a perspective view of the support plate 244 of the lock mechanism 240 of the embodiment as viewed from the front right upper side.

Fig. 30 is a perspective view of the state in which the lock pin 242 of the right caster 226 of the embodiment is held by the 1 st holding portion 244b as viewed from the front left upper side.

Fig. 31 is a perspective view of the state in which the lock pin 242 of the right caster 226 of the embodiment is held by the 2 nd holding portion 244c as viewed from the front left upper side.

Fig. 32 is a plan view of the right rear wheel 238 of the modification seen from above in a state of obliquely colliding with the step S.

Fig. 33 is a plan view of the right rear wheel 238 of the modification seen from above in a state facing the step S.

Fig. 34 is a plan view of the right rear wheel 238 of the embodiment as viewed from above in a state of obliquely colliding with the step S.

Fig. 35 is a plan view of the right rear wheel 238 of the embodiment as viewed from above in a state opposed to the step S.

Fig. 36 is a perspective view of the connection portion of the chassis frame 10 and the rear wheel unit 14 of the embodiment as viewed from the rear upper right.

Fig. 37 is a longitudinal sectional view of the connection portion of the chassis frame 10 and the rear wheel unit 14 of the embodiment.

Fig. 38 is a longitudinal sectional view of the state after the rear wheel unit 14 of the chassis frame 10 of the embodiment is rotated.

Fig. 39 is a perspective view of the carrier 2 of the embodiment, as viewed from the front upper right, in a state in which the 1 st shelf unit 300 is attached to the chassis unit 4.

Fig. 40 is a perspective view of the carrier 2 of the embodiment, which is seen from the front upper right, in a state in which the 1 st rack unit 300 is attached to the chassis unit 4 and the rack 302 is raised.

Fig. 41 is a perspective view of the shelf 302 of the 1 st shelf unit 300 of the embodiment as viewed from the rear left bottom.

Fig. 42 is a perspective view of the lower end of the support pipe 304b of the right side guard rail holding portion 328 of the embodiment as viewed from the front right upper side, in a state of abutting against the support plate 328 c.

Fig. 43 is a perspective view of the state in which the lower surface of the protection tube 304a of the right-side fence holding portion 328 of the embodiment is abutted against the edge of the right-side fence holding portion 328 as viewed from the front upper right.

Fig. 44 is a perspective view of the carrier 2 of the embodiment seen from the front upper right, in a state in which the 1 st rack unit 300 is mounted on the chassis unit 4 and the right side rail 304, the left side rail 306, and the front side rail 308 are held at lower positions.

Fig. 45 is a perspective view of the carrier 2 of the embodiment, in which the 2 nd shelf unit 400 is attached to the chassis unit 4, as viewed from the front upper right.

Fig. 46 is a perspective view of the carrier 2 of the embodiment, in which the 2 nd shelf unit 400 is attached to the chassis unit 4 and the movable mount 408 is tilted with respect to the fixed mount 412, as viewed from the front right and upper side.

Fig. 47 is a perspective view of the pallet unit 400 of the pallet unit 4 of the pallet truck 2 of the embodiment, which is seen from the front right and above, in a state in which the movable mount 408 is tilted with respect to the fixed mount 412 and the hopper mount 404 is tilted with respect to the movable mount 408.

Fig. 48 is a perspective view of the 2 nd shelf unit 400 of the embodiment, viewed from the rear left upper side, in a state in which the movable support base 408 is tilted with respect to the fixed support base 412 and the hopper support base 404 is tilted with respect to the movable support base 408.

Fig. 49 is a perspective view of the carrier 2 of the embodiment, in which the 3 rd shelf unit 500 is attached to the chassis unit 4, as viewed from the front upper right.

Fig. 50 is a perspective view of the carrier 2 of the embodiment, in which the 3 rd shelf unit 500 is attached to the chassis unit 4 and the movable mount 504 is tilted with respect to the fixed mount 508, as viewed from the front right and upper side.

Fig. 51 is a perspective view of the 3 rd shelf unit 500 of the embodiment, as viewed from the rear left upper side, in a state in which the movable mount 504 is tilted with respect to the fixed mount 508.

Fig. 52 is a perspective view of the carrier 2 of the embodiment, as viewed from the front upper right, in a state in which the 4 th shelf unit 600 is attached to the chassis unit 4.

Fig. 53 is a perspective view of the 4 th shelf unit 600 of the embodiment as seen from the rear right bottom.

Fig. 54 is a perspective view of the carrier 2 of the embodiment, in which the 5 th shelf unit 700 is attached to the chassis unit 4, as viewed from the front upper right.

Fig. 55 is a perspective view of the 5 th shelf unit 700 of the embodiment, as seen from the rear left bottom.

Fig. 56 is a plan view of a brake balancer 148 according to a modification of the embodiment as viewed from above.

Fig. 57 is a plan view of a brake balancer 148 according to another modification, which is seen from above.

Fig. 58 is a cross-sectional view of a motor 150 and a gear case 152 according to a modification.

Fig. 59 is a cross-sectional view of the state in which the inner cable 90a of the safety cable 90 of the motor 150 and the gear case 152 of the embodiment is pushed out relatively to the outer cable 90 b.

Fig. 60 is a plan view of a modified example of the right rear wheel 238 seen from above in a state rotated so that the side surface hits the step S.

Fig. 61 is a longitudinal sectional view of the bracket 234, the axle 236, and the right rear wheel 238 of the right caster 226 of the modification.

Fig. 62 is a perspective view of the positional relationship of the safety lever 42, the 1 st link member 84, and the 2 nd link member 86 of the modification example as viewed from the rear upper left.

Fig. 63 is a side view of the internal structure of the switch box 40 according to the modification seen from the right.

Fig. 64 is a side view of the internal structure of the switch box 40 according to the modification seen from the left.

Fig. 65 is a perspective view of a mower 902 according to a modification example, which is seen from the front right and upper side.

Fig. 66 is a perspective view of a mower 922 according to a modification example, which is seen from the front right and upper side.

Fig. 67 is a perspective view of a power cutter 942 of a modified example seen from the front right upper side.

Fig. 68 is a perspective view of a high-pressure washer 962 according to a modification example of the present invention as viewed from the front right upper side.

Detailed Description

Hereinafter, representative and non-limiting embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description is merely intended to illustrate the details of the preferred embodiments for practicing the invention to a person skilled in the art and is not intended to limit the scope of the invention. In order to provide a work machine, a method of manufacturing the work machine, and a method of using the work machine, additional features and aspects disclosed below may be used independently of or in combination with other features and aspects.

The combination of features and steps disclosed in the following detailed description is not essential to the practice of the invention in the broadest sense, and is described for the purpose of specifically describing representative embodiments of the invention only. Further, in providing additional and useful embodiments of the present invention, the various features of the representative embodiments described above and below and the various features recited in the independent claims and the dependent claims are not necessarily combined in the order of the specific examples described herein or in the order of the examples recited.

All the features described in the present specification and/or the claims are intended to be separately disclosed and independently of each other as a limitation on the disclosure of the original application and the specific matters claimed with respect to the structures of the features described in the embodiments and/or the claims. Further, the numerical ranges and descriptions relating to the organization and group are intended to be defined as specific matters of disclosure and claims of the original application, and disclosure of these intermediate structures is intended.

In one or more embodiments, the work machine may include: a battery box; and a battery detachably attached to the battery box. The battery box may include: a top cover; and a battery cover having a shape covering the battery mounted to the battery box and rotatable about a rotation axis with respect to the top cover. In the working machine, the battery cover and the top cover may be at least partially overlapped when the battery case is viewed from above in an open state in which the battery cover is opened. In the working machine, the battery cover and the top cover may overlap at least partially when the battery case is viewed from above in a closed state in which the battery cover is closed.

In one or more embodiments, in the working machine, the battery attached to the battery box may overlap with the battery cover when the battery box is viewed from above in the open state.

According to the above configuration, the battery cover covers the upper side of the battery even in the open state in which the battery cover is opened, so that water can be prevented from being sprayed onto the battery even when water is sprayed onto the battery box from above.

In one or more embodiments, a recess extending along the rotation axis may be formed in an upper portion of the battery cover.

According to the above structure, water attached to the upper portion of the battery cover can be guided by the concave surface to flow along the outer surface of the battery cover, so that water can be prevented from being sprayed onto the battery.

In one or more embodiments, the battery case may further include a water receiving portion disposed in the battery case at a position above the battery.

According to the above configuration, even when water that has been poured onto the battery box from above enters the inside of the battery box, the water can be received by the water receiving portion, and therefore water can be prevented from being poured onto the battery.

In one or more embodiments, the upper surface of the top cover and the upper surface of the battery cover may be inclined with respect to a horizontal plane.

According to the above configuration, when water is poured onto the battery box from above, the water can be dropped downward along the upper surface of the top cover and the upper surface of the battery cover.

In one or more embodiments, the battery can also be used in other electrical devices.

According to the above configuration, the battery can be shared by the work machine and other electric devices, and the convenience of the user can be improved.

Example (example)

The cart 2 of the present embodiment is a hand-propelled cart that is one type of working machine. The carrier 2 is configured by detachably attaching one of the 1 st rack unit 300 shown in fig. 39, the 2 nd rack unit 400 shown in fig. 45, the 3 rd rack unit 500 shown in fig. 49, the 4 th rack unit 600 shown in fig. 52, and the 5 th rack unit 700 shown in fig. 54 to the chassis unit 4 shown in fig. 1. In other embodiments, the carrier 2 may be configured by the chassis unit 4 to which one of the 1 st shelf unit 300, the 2 nd shelf unit 400, the 3 rd shelf unit 500, the 4 th shelf unit 600, and the 5 th shelf unit 700 is attached in a detachable manner. In the following description, among the 1 st shelf unit 300, the 2 nd shelf unit 400, the 3 rd shelf unit 500, the 4 th shelf unit 600, and the 5 th shelf unit 700, the shelf unit attached to the chassis unit 4 is also simply referred to as the shelf unit 800.

(Chassis unit 4)

As shown in fig. 1, the chassis unit 4 includes a handle bar unit 6, a battery box 8, a chassis frame 10, a front wheel unit 12, and a rear wheel unit 14.

(handle bar unit 6)

As shown in fig. 2, the handle bar unit 6 includes a handle bar base 16, a right handle bar 18, and a left handle bar 20. The handlebar base 16 includes a base tube 21, a right channel 22, a left channel 24, a square tube 26, a base plate 28, a right mounting fitting 30, and a left mounting fitting 32. The base pipe 21, the right side channel frame 22, the left side channel frame 24, the square pipe 26, the base plate 28, the right side mounting fitting 30, and the left side mounting fitting 32 are all made of steel. The cross-sectional shape of the base pipe 21 is a substantially circular shape. The base pipe 21 includes a central portion 21a extending in the left-right direction, a right side support portion 21b bent downward from the right end of the central portion 21a, and a left side support portion 21c bent downward from the left end of the central portion 21 a. The right side channel 22 includes a web 22a in the front-rear direction and the up-down direction, a front side flange 22b bent leftward from the front end of the web 22a, and a rear side flange 22c bent leftward from the rear end of the web 22 a. The right support portion 21b of the base pipe 21 is welded to the right groove frame 22 on the left side of the upper portion of the right groove frame 22. The left side channel frame 24 includes a web 24a in the front-rear direction and the up-down direction, a front side flange 24b bent rightward from the front end of the web 24a, and a rear side flange 24c bent rightward from the rear end of the web 24 a. The left support portion 21c of the base pipe 21 is welded to the left groove frame 24 on the right side of the upper portion of the left groove frame 24. The square pipe 26 extends in the left-right direction. The right end of the square pipe 26 is welded to the right channel 22 on the left side near the center of the right channel 22 in the up-down direction. The left end of the square tube 26 is welded to the left groove frame 24 on the right side near the center portion in the up-down direction of the left groove frame 24. The base plate 28 includes a wall portion 28a along the up-down direction and the left-right direction, and a bottom plate portion 28b bent rearward from the lower end of the wall portion 28 a. The upper end of the wall portion 28a is welded to the lower surface of the central portion 21a of the base pipe 21. The bottom plate 28b has a lower surface welded to the upper surface of the square pipe 26. The right mounting fitting 30 is welded to the lower end of the right channel 22. The left mounting fitting 32 is welded to the lower end of the left channel 24. As shown in fig. 1, the handle bar base 16 is fixed relative to the chassis frame 10 by the right side mounting fitting 30 being screwed to the frame plate 130 of the chassis frame 10 and the left side mounting fitting 32 being screwed to the frame plate 130 of the chassis frame 10.

As shown in FIG. 2, the right handlebar 18 includes a tube 34, a channel 36, a grip 38, a switch box 40 and a safety lever 42. Both the tube 34 and the channel 36 are made of steel. The tube 34 includes a support portion 34a extending in the up-down direction and a handle portion 34b bent rearward from the upper end of the support portion 34 a. The channel 36 includes a web 36a extending in the front-rear direction and the up-down direction, a front flange 36b bent rightward from the front end of the web 36a, and a rear flange 36c bent rightward from the rear end of the web 36 a. The tube 34 is welded to the channel 36 on the right side of the channel 36. The grip portion 38, the switch box 40, and the safety lever 42 are mounted to the handle portion 34b of the tube 34.

The left side handlebar 20 includes a tube 44, a channel 46, a grip 48 and a brake lever 49. Both the tube 44 and the channel 46 are made of steel. The tube 44 includes a support portion 44a extending in the up-down direction and a handle portion 44b bent rearward from the upper end of the support portion 44 a. The channel 46 includes a web 46a in the front-rear direction and the up-down direction, a front flange 46b bent leftward from the front end of the web 46a, and a rear flange 46c bent leftward from the rear end of the web 46 a. The tube 44 is welded to the channel 46 on the left side of the channel 46. The grip portion 48 and the brake lever 49 are mounted to the handle portion 44b of the tube 44.

The right handlebar 18 is fixed to the handlebar base 16 by means of clamp bolts 50, 52. The left side handlebar 20 is fixed to the handlebar base 16 by means of clamp bolts 54, 56. The clamping bolts 50, 52, 54, 56 include heads 50a, 52a, 54a, 56a and shaft portions 50b, 52b, 54b, 56b, respectively. As shown in fig. 3, through holes 22d, 22e are formed in the web 22a of the right channel 22 of the handle base 16 in a vertically aligned manner. As shown in fig. 4, nuts 58, 60 are welded to the left side surface of the web 22a of the right channel 22 at positions corresponding to the through holes 22d, 22e. Similarly, through holes 24d, 24e are formed in the web 24a of the left side channel bracket 24 of the handlebar base 16 in an aligned manner in the up-down direction. As shown in fig. 3, nuts 62, 64 are welded to the right side surface of the web 24a of the left side channel frame 24 at positions corresponding to the through holes 24d, 24e. As shown in fig. 5, a long hole 36d extending in the up-down direction is formed in the web 36a of the channel bracket 36 of the right handlebar 18. As shown in fig. 6, a long hole 46d extending in the up-down direction is formed in the web 46a of the channel 46 of the left handlebar 20.

As shown in fig. 2, when the right handlebar 18 is fixed to the handlebar base 16, the shaft portion 50b of the clamp bolt 50 is threaded through the long hole 36d of the right handlebar 18 and the through hole 22d of the handlebar base 16 to the nut 58, and the shaft portion 52b of the clamp bolt 52 is threaded through the long hole 36d of the right handlebar 18 and the through hole 22e of the handlebar base 16 to the nut 60. Accordingly, the left side surface of the web 36a of the channel 36 of the right side handlebar 18 is brought into contact with the right side surface of the web 22a of the right side channel 22 of the handlebar base 16, and the channel 36 of the right side handlebar 18 and the right side channel 22 of the handlebar base 16 are clamped by the heads 50a, 52a of the clamping bolts 50, 52 and the nuts 58, 60. Thereby, the right handlebar 18 can be fixed to the handlebar base 16. In the following description, the clamping bolts 50 and 52 and the nuts 58 and 60 are also collectively referred to as a right clamping mechanism 51. The clamp bolt 52 and the nut 60 are also referred to as a right rotation limiting mechanism 53. The right rotation limiting mechanism 53 limits rotation of the right handlebar 18 relative to the handlebar base 16 about the clamp bolt 50.

Similarly, when the left side handlebar 20 is fixed to the handlebar base 16, the shaft portion 54b of the clamp bolt 54 is threaded through the long hole 46d of the left side handlebar 20 and the through hole 24d of the handlebar base 16 to the nut 62, and the shaft portion 56b of the clamp bolt 56 is threaded through the long hole 46d of the left side handlebar 20 and the through hole 24e of the handlebar base 16 to the nut 64. Thus, the left side channel 46 of the left side handlebar 20 and the left side channel 24 of the handlebar base 16 are clamped by the heads 54a, 56a and nuts 62, 64 of the clamping bolts 54, 56 in a state in which the right side surface of the web 46a of the channel 46 of the left side handlebar 20 is in contact with the left side surface of the web 24a of the left side channel 24 of the handlebar base 16. This can fix the left handlebar 20 to the handlebar base 16. In the following description, the clamping bolts 54 and 56 and the nuts 62 and 64 are also collectively referred to as a left clamping mechanism 55. The clamp bolt 56 and the nut 64 are also referred to as a left rotation restricting mechanism 57. The left rotation limiting mechanism 57 limits rotation of the left handlebar 20 relative to the handlebar base 16 about the clamp bolt 54.

The right handlebar 18 is movable in the up-down direction relative to the handlebar base 16 with the clamp bolts 50, 52 loosened. In a state in which the position of the right handlebar 18 in the up-down direction relative to the handlebar base 16 is adjusted to a desired position, the right handlebar 18 can be fixed relative to the handlebar base 16 at the adjusted position by tightening the clamp bolts 50, 52. Similarly, the left handlebar 20 can be moved in the up-down direction relative to the handlebar base 16 with the clamp bolts 54, 56 loosened. In a state in which the position of the left handlebar 20 in the up-down direction relative to the handlebar base 16 is adjusted to a desired position, the left handlebar 20 can be fixed relative to the handlebar base 16 at the adjusted position by tightening the clamp bolts 54, 56. If the right handlebar 18 and the left handlebar 20 are integrated and the positions of both the right handlebar 18 and the left handlebar 20 in the up-down direction relative to the handlebar base 16 can be adjusted integrally, the weight of the integrated right handlebar 18 and left handlebar 20 is large, and therefore, a large force is required for adjusting the positions in the up-down direction relative to the handlebar base 16. In contrast, in the truck 2 of the present embodiment, the right handlebar 18 and the left handlebar 20 are independent of each other, and the positions in the up-down direction relative to the handlebar base 16 can be individually adjusted. In this case, since the respective weights of the right-side handlebar 18 and the left-side handlebar 20 are not so large, the force required for adjusting the position in the up-down direction with respect to the handlebar base 16 can be reduced.

As shown in fig. 3, an elastic engagement piece 22f protruding rightward is formed on the web 22a of the right channel 22 of the handle base 16. As shown in fig. 4, an elastic engagement piece 24f protruding leftward is formed on the web 24a of the left side channel bracket 24 of the handle bar base 16. The position of the elastic engagement piece 22f of the right channel 22 in the up-down direction is substantially the same as the position of the elastic engagement piece 24f of the left channel 24 in the up-down direction. As shown in fig. 5, a plurality of engagement holes 36e are formed in the web 36a of the channel bracket 36 of the right handlebar 18 in correspondence with the elastic engagement pieces 22f of the right channel bracket 22. The plurality of engagement holes 36e are arranged at predetermined intervals in the up-down direction. As shown in fig. 6, a plurality of engagement holes 46e are formed in the web 46a of the channel 46 of the left handlebar 20 in correspondence with the elastic engagement pieces 24f of the left channel 24. The plurality of engagement holes 46e are arranged at predetermined intervals in the up-down direction. The position in the up-down direction of each engagement hole 36e of the plurality of engagement holes 36e of the right handlebar 18 is substantially the same as the position in the up-down direction of each engagement hole 46e of the plurality of engagement holes 46e of the left handlebar 20. The right handlebar 18 can be fixed to the handlebar base 16 with the elastic engagement piece 22f inserted into one of the engagement holes 36e of the plurality of engagement holes 36e. Similarly, the left side handlebar 20 can be fixed to the handlebar base 16 with the elastic engagement piece 24f inserted into one of the engagement holes 46e. By associating the engagement hole 36e into which the elastic engagement piece 22f is inserted with the engagement hole 46e into which the elastic engagement piece 24f is inserted, the attachment position of the right handlebar 18 with respect to the handlebar base 16 in the up-down direction and the attachment position of the left handlebar 20 with respect to the handlebar base 16 in the up-down direction can be made substantially the same. For example, in a state in which the elastic engagement piece 22f is brought into the engagement hole 36e located at the uppermost position among the plurality of engagement holes 36e, the right handlebar 18 is fixed to the handlebar base 16, and in a state in which the elastic engagement piece 24f is brought into the engagement hole 46e located at the uppermost position among the plurality of engagement holes 46e, the left handlebar 20 is fixed to the handlebar base 16, whereby, as shown in fig. 1, both the right handlebar 18 and the left handlebar 20 can be fixed at the lowest positions with respect to the handlebar base 16. Alternatively, the right handlebar 18 is fixed to the handlebar base 16 with the elastic engagement piece 22f being inserted into the engagement hole 36e located at the lowest position among the plurality of engagement holes 36e, and the left handlebar 20 is fixed to the handlebar base 16 with the elastic engagement piece 24f being inserted into the engagement hole 46e located at the lowest position among the plurality of engagement holes 46e, whereby both the right handlebar 18 and the left handlebar 20 can be fixed at the highest positions with respect to the handlebar base 16, as shown in fig. 7. Hereinafter, the elastic engagement piece 22f and the plurality of engagement holes 36e are also collectively referred to as the right side positioning mechanism 23, and the elastic engagement piece 24f and the plurality of engagement holes 46e are also collectively referred to as the left side positioning mechanism 25.

In addition, the clamping bolts 50 and 52 can be tightened in a state where the elastic engagement piece 22f does not enter any of the engagement holes 36e, and the right handlebar 18 can be fixed to the handlebar base 16. In this case, the elastic engagement piece 22f is pressed by the web 36a of the channel 36 and elastically deformed to the left. Similarly, the left side handlebar 20 can be fixed to the handlebar base 16 by tightening the clamp bolts 54 and 56 without the elastic engagement piece 24f entering any one of the engagement holes 46 e. In this case, the elastic engagement piece 24f is pressed by the web 46a of the channel 46 and elastically deformed rightward.

In another embodiment, the grip portion 34b of the right handlebar 18 can be bent rightward or leftward from the upper end of the support portion 34a, and the grip portion 44b of the left handlebar 20 can be bent rightward or leftward from the upper end of the support portion 44 a. In addition, in still another embodiment, the right handlebar 18 and the left handlebar 20 may be integrally formed, for example, like a U-handle.

(Right handlebar 18)

As shown in fig. 5, in the right handlebar 18, the switch box 40 is provided in front of the grip portion 38. In addition, the safety lever 42 is provided above the grip portion 38.

The switch box 40 includes a housing 66, an operation panel 68, an alarm button 70, an operation lever 72, and a tail lamp 74. The case 66 is a resin member. The operation panel 68 is provided on the upper surface of the housing 66. The operation panel 68 includes a main power button 68a, a main power display lamp 68b, a forward/reverse switch button 68c, a forward display lamp 68d, a reverse display lamp 68e, a speed switch button 68f, and a speed indicator 68g. The main power button 68a is a button for switching on/off of the main power of the truck 2 by a user. The main power supply display lamp 68b is turned on when the main power supply of the truck 2 is turned on, and is turned off when the main power supply of the truck 2 is turned off. The forward/reverse switching button 68c is a button for switching the forward mode and the reverse mode of the truck 2 by the user. In the forward mode, the truck 2 drives a motor 150 (see fig. 1) described later to rotate the right front wheel 140 and the left front wheel 142 (see fig. 1) described later in the forward direction, and in the reverse mode, the truck 2 drives the motor 150 to rotate the right front wheel 140 and the left front wheel 142 in the reverse direction. The forward display lamp 68d is turned on when the truck 2 is operated in the forward mode, and turned off when the truck 2 is operated in the backward mode. The reverse display lamp 68e is turned on when the truck 2 is operated in the reverse mode, and turned off when the truck 2 is operated in the forward mode. The speed switching button 68f is a button for switching the traveling speed of the truck 2 by the user. In the truck 2 of the present embodiment, the traveling speed can be switched in multiple stages (for example, in three stages). The truck 2 controls the rotation speed of the motor 150 when the motor 150 is driven, based on the traveling speed set by the speed switching button 68 f. The speed indicator 68g changes the number of windows to be lighted according to the traveling speed of the truck 2 set by the speed switching button 68 f. As shown in fig. 8, an operation board 76 is accommodated inside the case 66 below the operation panel 68. The operation board 76 includes a main power button 68a, a forward/reverse switching button 68c, a switch (not shown) for detecting a user operation of the speed switching button 68f, and LEDs (not shown) for turning on/off the main power display lamp 68b, the forward display lamp 68d, the reverse display lamp 68e, the speed indicator 68g, and the like.

As shown in fig. 5, the warning sound button 70 is provided on the side surface of the case 66 and is positioned to the left of the operation panel 68. The warning sound button 70 is a button for a user to perform a sounding operation of a buzzer 124 (see fig. 13) described later. When the user operates the warning sound button 70, the buzzer 124 of the truck 2 is sounded to sound a warning sound. In the case where the vehicle 2 includes a speaker (not shown) other than the buzzer 124, the vehicle 2 may be configured to output predetermined music or sound from the speaker in response to a user's operation of the warning sound button 70.

The operation lever 72 is a resin member. As shown in fig. 8, the operation lever 72 includes a support portion 72a, an operation piece 72b, and a detection piece 72c. The support portion 72a, the operation piece 72b, and the detection piece 72c are integrally formed. The support portion 72a and the detection piece 72c are accommodated inside the case 66. The operation piece 72b protrudes from the inside to the outside of the housing 66 via an opening 66a formed in the rear surface of the housing 66. The support portion 72a is rotatably supported by the housing 66 about a rotation shaft 72d extending in the left-right direction. A drive switch 78 is accommodated inside the case 66 in the vicinity of the detection piece 72c. When the user pushes the operation piece 72b upward, the operation piece 72b, the support portion 72a, and the detection piece 72c integrally rotate about the rotation shaft 72d, and as shown in fig. 9, the drive switch 78 is pressed by the detection piece 72c. A compression spring (not shown) is accommodated in the housing 66, and the compression spring imparts a torque to the operation lever 72 in a direction to move the operation piece 72b downward. When the user's hand is separated from the operation piece 72b, the support portion 72a, and the detection piece 72c are integrally rotated about the rotation shaft 72d by the urging force of the compression spring, and as shown in fig. 8, the detection piece 72c is separated from the drive switch 78. Further, around the operation piece 72b, the opening 66a of the housing 66 is covered with the bellows cover 80. The bellows cover 80 is used to prevent foreign matter from entering the interior of the housing 66 from the exterior of the housing 66 through the opening 66 a.

The operation panel 68 is disposed on the upper surface of the housing 66. The warning sound button 70 is disposed on a side surface of the housing 66. The operation lever 72 is disposed at the rear of the housing 66. With such a configuration, the user can operate the operation panel 68, the warning sound button 70, and the operation lever 72 with the fingers of the right hand while holding the grip portion 38 with the right hand.

The tail lamp 74 is provided on the rear surface of the housing 66 and is located below the operation lever 72. When the right headlight 156 and the left headlight 158 described later are on, the tail lamp 74 is turned on, and when the right headlight 156 and the left headlight 158 described later are off, the tail lamp 74 is turned off. The tail lamp 74 illuminates the rear of the carrier 2 and functions as a high vision recognition unit. As shown in fig. 8, a tail lamp substrate 82 is accommodated inside the case 66 and in front of the tail lamp 74. The tail lamp substrate 82 includes an LED (not shown) or the like for turning on/off the tail lamp 74. The tail lamp 74 may be turned on/off by, for example, a surface-emitting LED. Since the tail lamp 74 is disposed in the front of the grip portion 38, for example, when the truck 2 moves backward, the grip portion 38 collides with an obstacle first even when it collides with the obstacle at the rear, and therefore the tail lamp 74 can be prevented from being broken by collision with the obstacle.

From the viewpoint of safety of the operator at night, the brightness of the tail lamp 74 is desirably a brightness at which the lighting of the tail lamp 74 can be visually recognized from a distance of 100m behind at night. The color emitted from the tail lamp 74 is desirably a color including red, specifically, orange, red, or the like. As the brightness of the degree that can be visually recognized from a distance of 100m from the rear at night, for example, in the case of using an LED, it is sufficient that the standard of the rear lamp of the bicycle (in particular, the standard concerning the illuminance and/or the color of light of the rear lamp) specified in japanese industrial standard JISC9502 is satisfied.

The truck 2 may be configured to light the tail lamp 74 in conjunction with the start of the truck 2. The truck 2 may illuminate the tail lamp 74 or may blink the tail lamp 74. For example, the truck 2 may be configured to: the tail lamp 74 is turned on at normal times, and the tail lamp 74 is blinked when a deceleration state of the truck 2 is detected by an acceleration sensor (not shown) or the like. Alternatively, the truck 2 may be configured to: the tail lamp 74 is turned off in normal operation, and the tail lamp 74 is turned on when the ambient dimming is detected by a photosensor (not shown) or the like. The truck 2 may be configured to: the driving of the motor 150 can be detected in advance by a vibration sensor (not shown) or the like, and when the periphery is darkened and the motor 150 is driven, the tail lamp 74 can be turned on. Alternatively, the truck 2 may be configured to: when the remaining power of the battery pack 112 (see fig. 14) described later is small, the power supply to the tail lamp 74 is continued while the power supply to the motor 150, the shelf unit 800, and the like is stopped.

The truck 2 may be provided with a reflective material (not shown) on the rear surface of the housing 66 instead of the tail lamp 74. The reflective material receives light and reflects the light, thereby illuminating the rear of the truck 2 and functioning as a high-vision recognition unit. The reflective material may be provided with a retro-reflective material. The reflective material is expected to have a property of being able to visually recognize reflected light when light is irradiated from a distance of 100m from the rear at night by a headlight or the like of a vehicle. The color of the light reflected by the reflective material is desirably a color including red, specifically, orange, red, or the like. Alternatively, a member in which a reflecting material and the tail lamp 74 are combined may be used to further improve visibility from the rear. In this case, the tail lamp 74 and the reflecting material may be integrated.

As shown in fig. 10, when the chassis unit 4 is viewed from the rear plane, the distance D from the center of the chassis unit 4 in the left-right direction to the center of the tail lamp 74 in the left-right direction is 150mm or more, preferably 200mm or more, for example, about 250mm. For example, when the distance D is 150mm or more, the distance between the right handlebar 18 and the left handlebar 20 is 300mm or more, which is larger than the standard waist width of an adult. When the distance D is 200mm or more, the distance between the right handlebar 18 and the left handlebar 20 is 400mm or more, which is larger than the shoulder width of a standard adult. The distance D can be selected based on the standard waist width and shoulder width described above, taking into consideration the posture of the operator based on the shape of the right handlebar 18 and the shape of the left handlebar 20. With such a configuration, even when the user grips the right handlebar 18 and the left handlebar 20 and stands behind the carrier 2, the tail lamp 74 is not blocked by the body of the user, and the tail lamp 74 can be visually recognized from a position behind the user. The center of the chassis unit 4 in the left-right direction may be a position corresponding to the center of the trunk of the user when the user holds the right handle bar 18 and the left handle bar 20 and stands behind the carrier 2, and may be a position between the center of the right front wheel 140 in the left-right direction and the center of the left front wheel 142 in the left-right direction, a position between the center of the right rear wheel 238 in the left-right direction and the center of the left rear wheel 258 in the left-right direction, a position between the center of the handle bar unit 6 in the left-right direction, or a position between the center of the grip portion 38 of the right handle bar 18 in the left-right direction and the center of the grip portion 48 of the left handle bar 20 in the left-right direction. The tail lamp 74 may be provided at a position other than the switch box 40 of the chassis unit 4 as long as it is visually recognized from a position behind the user in a state where the user holds the right handlebar 18 and the left handlebar 20 and stands behind the carrier 2. For example, the tail lights 74 may be provided on the right side channel 22, left side channel 24 of the handlebar base 16. Alternatively, the tail lamp 74 may be provided on the rear end surfaces of the channel 36 and the grip portion 38 of the right handlebar 18. Alternatively, the tail lamp 74 may be provided on the rear end surfaces of the channel 46 and the grip 48 of the left handlebar 20. Alternatively, the tail lamp 74 may be provided in the vicinity of the right rear wheel 238 and the vicinity of the left rear wheel 258 in the rear wheel frame 225 of the rear wheel unit 14 described later. It is desirable that the tail lamp 74 be capable of being lighted from a distance of 100m rearward at night even when it is provided at these locations.

As shown in fig. 8 and 9, the housing 66 also houses a 1 st link member 84, a 2 nd link member 86, and a safety switch 88. The 1 st link member 84 is slidably held in the housing 66 in a predetermined sliding direction (see arrows in fig. 8 and 9). As shown in fig. 11, the 1 st link member 84 includes a support beam 84a extending in a substantially straight line from the upper end to the lower end, an auxiliary beam 84b bent upward after extending rightward from the intermediate portion of the support beam 84a, and a pin 84c extending rightward from the lower end of the support beam 84 a. As shown in fig. 8 and 9, the support beam 84a extends from the upper portion to the lower portion of the interior of the housing 66 at a position on the left side of the operation lever 72. The auxiliary beam 84b is formed in a shape that does not interfere with the grip portion 38 located above and the operation lever 72 located below in the movable range of the 1 st link member 84. The 2 nd link member 86 is rotatably held by the housing 66 about a rotation shaft 86a extending in the left-right direction. A long hole 86b is formed at the rear end of the 2 nd link member 86. The pin 84c of the 1 st link member 84 enters the long hole 86b of the 2 nd link member 86. When the 1 st link member 84 slides in the sliding direction, the pin 84c presses the side wall of the long hole 86b while sliding with respect to the side wall of the long hole 86b, thereby rotating the 2 nd link member 86 about the rotation shaft 86 a. The safety switch 88 is disposed opposite to the protrusion 86c formed on the 2 nd link member 86. When the 2 nd link member 86 rotates so as to move the rear end of the 2 nd link member 86 upward, the protrusion 86c presses the safety switch 88, and when the 2 nd link member 86 rotates so as to move the rear end of the 2 nd link member 86 downward, the protrusion 86c moves away from the safety switch 88. The 2 nd link member 86 is biased in a rotational direction in which the rear end moves upward by a torsion spring, not shown. A cable holder 86d is provided at the front end of the 2 nd link member 86. A safety cable 90 is inserted at a front lower portion of the housing 66. The safety cable 90 includes an inner cable 90a and an outer cable 90b surrounding the inner cable 90 a. The outer cable 90b is held to the housing 66. The inner cable 90a is held by the cable holder 86d.

As shown in fig. 5, the safety lever 42 is formed in a shape along the upper surface of the grip portion 38. The safety lever 42 is a resin member. The rear end of the safety lever 42 is rotatably held at the rear end of the grip portion 38 via a rotation shaft 42a extending in the left-right direction. The front end of the safety lever 42 is slidably held at the upper end of the 1 st link member 84.

When the user grips the grip portion 38, the safety lever 42 is pushed downward by the palm of the user. In this case, the 1 st link member 84 moves downward in the sliding direction, and the 2 nd link member 86 rotates in the rotation direction in which the rear end goes downward. As a result, as shown in fig. 9, the inner cable 90a of the safety cable 90 is pulled out relative to the outer cable 90 b. In addition, the protrusion 86c of the 2 nd link member 86 is separated from the safety switch 88. When the user's hand is separated from the grip portion 38 from this state, the 2 nd link member 86 is rotated in the rotational direction in which the rear end is moved upward by the urging force of the torsion spring, and the 1 st link member 84 is moved upward in the sliding direction. As a result, as shown in fig. 8, the inner cable 90a of the safety cable 90 is pushed in against the outer cable 90 b. In addition, the protrusion 86c of the 2 nd link member 86 presses the safety switch 88. And the front end of the safety lever 42 is pushed upward.

The 1 st link member 84 and the 2 nd link member 86 may be configured as shown in fig. 62. In the structure shown in fig. 62, the pin 84c of the 1 st link member 84 extends leftward from the lower end of the support beam 84 a. The 1 st link member 84 includes a roller 84d rotatably held by the pin 84c and a block 84e protruding rightward from the lower end of the support beam 84 a. In the structure shown in fig. 62, the long hole 86b and the protrusion 86c are not formed in the 2 nd link member 86. The roller 84d of the 1 st link member 84 abuts against the upper surface of the 2 nd link member 86 near the rear end of the 2 nd link member 86.

In the structure using the 1 st link member 84 and the 2 nd link member 86 shown in fig. 62, as shown in fig. 63 and 64, the inner space of the housing 66 is divided left and right by the inner wall 66 b. A long hole 66c is formed in the inner wall 66 b. The long side direction of the long hole 66c is along the sliding direction of the 1 st link member 84. As shown in fig. 63, the support beam 84a and the block 84e of the 1 st link member 84 and the safety switch 88 are disposed in a space on the right side of the inner wall 66 b. The pin 84c of the 1 st link member 84 penetrates the long hole 66c. As shown in fig. 64, the roller 84d of the 1 st link member 84, the 2 nd link member 86, and the safety cable 90 are disposed in a space on the left side of the inner wall 66 b.

In the configuration shown in fig. 62 to 64, when the user presses the safety lever 42 downward, the 1 st link member 84 moves downward in the sliding direction, and the roller 84d presses while rolling on the upper surface near the rear end of the 2 nd link member 86. Thus, the 2 nd link member 86 rotates about the rotation shaft 86a, and the distal end of the 2 nd link member 86 moves upward, and the inner cable 90a of the safety cable 90 is pulled out relative to the outer cable 90 b. Further, the 1 st link member 84 moves downward in the sliding direction, whereby the block 84e of the 1 st link member 84 presses the safety switch 88. When the user's hand is separated from the safety lever 42 from this state, the 2 nd link member 86 is rotated in a rotation direction in which the front end is directed downward and the rear end is directed upward by the biasing force of a torsion spring, not shown. Thereby pushing the inner cable 90a of the safety cable 90 relatively to the outer cable 90 b. Further, by pushing up the roller 84d by the upper surface of the 2 nd link member 86, the 1 st link member 84 moves upward in the sliding direction, and the block 84e of the 1 st link member 84 is separated from the safety switch 88. And the front end of the safety lever 42 is pushed upward.

A signal cable 92 is inserted into a lower portion of the front end of the housing 66. Wiring extending from the operation board 76, the warning sound button 70, the drive switch 78, the tail lamp board 82, and the safety switch 88 in the case 66 is led out of the case 66 via the signal cable 92.

(left side handle bar 20)

As shown in fig. 6, a brake cable 94 is connected to the brake lever 49 in the left handlebar 20. Brake cable 94 includes an inner cable 94a and an outer cable 94b surrounding inner cable 94 a. The brake lever 49 is pressed downward by the biasing force of a torsion spring, not shown. When the user pushes up the brake lever 49, the inner cable 94a of the brake cable 94 is pulled out relatively to the outer cable 94b. When the user's hand is moved away from the brake lever 49, the brake lever 49 is depressed by the urging force of the torsion spring, thereby pushing the inner cable 94a of the brake cable 94 relatively to the outer cable 94b.

(Battery box 8)

As shown in fig. 12 and 13, the battery box 8 includes a housing 100, a top cover 102, a front cover 104, and a battery cover 106. The case 100, the top cover 102, the front cover 104, and the battery cover 106 are all members made of resin. The housing 100 has a box shape. A top cover 102 is mounted on the upper surface of the housing 100. The top cover 102 has a substantially flat plate shape, and is inclined from above to below as going from the front to the rear. A front cover 104 is mounted on the front surface of the housing 100. The front cover 104 has a substantially flat plate shape and is substantially orthogonal to the front-rear direction. In a state where the battery case 8 is mounted on the bottom plate portion 28b (see fig. 2) of the base plate 28 of the handle unit 6, the front cover 104 is screwed to the wall portion 28a (see fig. 2) of the base plate 28, whereby the battery case 8 is fixed to the handle unit 6.

As shown in fig. 14, a control board 108 is accommodated in the case 100. In addition, a plurality of battery mounting portions 110 are provided on the rear surface of the case 100. The plurality of battery packs 112 are detachably attached to the plurality of battery attachment portions 110. The plurality of battery packs 112 are each provided with a secondary battery cell such as a lithium ion battery cell (not shown), and can be charged by a charger (not shown). For example, the rated voltage of each of the plurality of battery packs 112 is 18V, and the rated capacity thereof is 6.0Ah. The plurality of battery packs 112 may be used for electric devices other than the carrier 2, for example, electric tools such as electric screwdrivers and electric work machines such as electric mowers. As shown in fig. 15, in the truck 2 of the present embodiment, a plurality of (e.g., four) battery packs 112 are classified into a 1 st (e.g., two on the left) battery pack 112a and a 2 nd (e.g., two on the right) battery pack 112b. The truck 2 of the present embodiment can switch between a state in which the 1 st battery pack 112a is connected in series and used as a power source of the truck 2, and a state in which the 2 nd battery pack 112b is connected in series and used as a power source of the truck 2.

As shown in fig. 12, the battery cover 106 is attached to the housing 100 via a hinge portion 106a provided at an upper end of the battery cover 106. The battery cover 106 is rotatable relative to the housing 100 about a rotation shaft 106b extending in the left-right direction. As shown in fig. 12 and 13, the battery cover 106 includes an upper inclined surface 106c inclined from front to rear as going from above to below, a lower inclined surface 106d continuously formed from the upper inclined surface 106c and inclined from rear to front as going from above to below, a bottom surface 106e continuously formed from the lower inclined surface 106d and substantially orthogonal to the vertical direction, a right side surface 106f connecting the right end of the upper inclined surface 106c, the right end of the lower inclined surface 106d and the right end of the bottom surface 106e, and a left side surface 106g connecting the left end of the upper inclined surface 106c, the left end of the lower inclined surface 106d and the left end of the bottom surface 106 e. A concave surface 106h recessed forward is formed at an upper portion of the upper inclined surface 106c, and the hinge portion 106a is provided at the concave surface 106h. As shown in fig. 14, when the battery cover 106 is closed with respect to the case 100, the battery cover 106 covers the periphery of the plurality of battery packs 112 attached to the plurality of battery attachment portions 110. In this state, since the upper surface of the top cover 102 and the upper surface of the battery cover 106 are inclined with respect to the horizontal plane, even when water adheres to the upper surfaces of the top cover 102 and the battery cover 106, water drops downward of the battery box 8 along the upper surfaces of the top cover 102 and the battery cover 106.

As shown in fig. 15 and 16, in a state where the battery cover 106 is opened with respect to the case 100, the plurality of battery packs 112 are detachable from the plurality of battery mounting portions 110 by sliding in a predetermined sliding direction (see arrow in fig. 16). The battery cover 106 is disposed at a position that does not interfere with the sliding operation of the plurality of battery packs 112 when the battery cover 106 is opened with respect to the housing 100. Therefore, the open battery cover 106 does not become an obstacle when the plurality of battery packs 112 are attached and detached.

As shown in fig. 14 and 16, the rotation shaft 106b of the battery cover 106 is disposed below the top cover 102, and the rear end of the top cover 102 extends to a position rearward of the rotation shaft 106 b. Therefore, as shown in fig. 14, when the battery case 8 is viewed from above in a state where the battery cover 106 is closed with respect to the case 100, the battery cover 106 and the top cover 102 partially overlap. As shown in fig. 16, when the battery case 8 is viewed from above in a state in which the battery cover 106 is opened with respect to the case 100, the battery cover 106 and the top cover 102 partially overlap. With such a configuration, even when water adheres to the outer surfaces of the top cover 102 and the battery cover 106, water dripping onto the battery pack 112 attached to the battery attachment portion 110 can be suppressed. Further, an eave portion 102a covering the upper side of the hinge portion 106a is formed at a portion corresponding to the hinge portion 106a at the rear end of the top cover 102. This can prevent water droplets from adhering to the hinge 106a and affecting the turning operation of the battery cover 106.

As shown in fig. 15 and 16, a water receiving portion 110b surrounded by a side wall 110a is formed on the upper surface of the plurality of battery mounting portions 110. Therefore, even when water drops onto the upper surfaces of the plurality of battery mounting portions 110, it is possible to suppress water from reaching the battery pack 112 mounted on the battery mounting portion 110.

As shown in fig. 15, a sealing member 114 may be attached to the rear surface of the housing 100. The sealing member 114 is, for example, an O-ring made of rubber, and is disposed so as to surround the periphery of the plurality of battery mounting portions 110. A rib 116 is formed in the battery cover 106 in correspondence with the seal member 114. In a state where the battery cover 106 is closed with respect to the case 100, the rib 116 abuts against and presses against the seal member 114. This prevents water from entering the battery cover 106 in a state where the battery cover 106 is closed with respect to the case 100.

The battery cover 106 is biased in a closing direction with respect to the housing 100 by a torsion spring, not shown. In the carrier 2, the gravity acting on the battery cover 106 acts as a force in a direction to close the battery cover 106 with respect to the housing 100. The battery cover 106 is provided with a latch member 118 that can be operated by a user. In the closed state of the battery cover 106, the latch member 118 engages with the latch receiver 100a formed at the lower portion of the housing 100, whereby the battery cover 106 can be held in the closed state.

As shown in fig. 12, the top cover 102 is provided with an operation panel 120. The operation panel 120 includes a battery remaining power indicator 120a, a power supply switching knob 120b, an illumination lighting button 120c, a display switching button 120d, and a shelf operation switch 120e. The battery remaining charge indicator 120a is provided corresponding to each of the plurality of battery mounting units 110, and changes the number of lighted windows according to the battery remaining charge of each of the plurality of battery packs 112 mounted to the plurality of battery mounting units 110. The power supply switching knob 120b is a knob used by the user to perform a switching operation to select whether to set the power supply of the truck 2 to the 1 st group battery pack 112a or to set the power supply of the truck 2 to the 2 nd group battery pack 112b. The illumination lighting button 120c is a button for a user to switch on/off of a right headlight 156 and a left headlight 158, which will be described later. The display switching button 120d is a button used by the user to switch on/off of the display of the battery remaining amount based on the battery remaining amount indicator 120 a. The shelf operation switch 120e is, for example, a momentary rocker switch, and is a switch for receiving an operation of the shelf unit 800 by a user. As shown in fig. 14 and 16, an operation board (not shown) and a power supply changeover switch 122 are housed inside the case 100 below the operation panel 120. The operation board includes an LED (not shown) for turning on/off the battery remaining power indicator 120a, and a switch (not shown) for detecting the operation of the lighting button 120c and the display switching button 120d by the user. The power switch 122 detects the operation of the power switch knob 120b by the user.

As shown in fig. 13, a buzzer 124 is provided at the upper right portion of the front cover 104. When the user presses the warning sound button 70 of the right handlebar 18, the buzzer 124 sounds to sound a warning sound. A signal cable 92 (see fig. 8 and 9) for connecting the switch box 40 and the battery box 8, a power supply cable 156a (see fig. 17) for connecting the battery box 8 to a right headlight 156 and a left headlight 158 (see fig. 17) described later, a power cable not shown for connecting the battery box 8 and the motor 150, and a power cable not shown for connecting the battery box 8 and the shelf unit 800 are inserted into the lower surface of the housing 100.

As shown in fig. 15, a key attachment portion 128 to which the key 126 can be attached and detached is provided on the rear surface of the housing 100. The key 126 is detachable by being inserted into and removed from the key mounting portion 128. In a state where the keys 126 are detached from the key mounting portions 128, power supply from the plurality of battery packs 112 to the motor 150 described later is cut off. In a state where the keys 126 are attached to the key attaching portions 128, power supply from the plurality of battery packs 112 to the motor 150 is permitted.

(Chassis frame 10)

As shown in fig. 1, the chassis frame 10 includes a frame plate 130, a right side frame tube 132, a left side frame tube 134, and a center frame tube 136. The frame plate 130, the right side frame tube 132, the left side frame tube 134, and the center frame tube 136 are all made of steel. The frame plate 130 includes a substantially rectangular bottom plate 130a having a long side along the left-right direction and a short side along the front-rear direction, a front side flange 130b bent downward from the front end of the bottom plate 130a, and a rear side flange 130c bent downward from the rear end of the bottom plate 130a (see fig. 36 and 38). A plurality of reinforcing ribs, not shown, are arranged between the front side edge 130b and the rear side edge 130c in the front-rear direction and the left-right direction on the lower surface of the frame plate 130. The rear wheel unit 14 is mounted on the frame plate 130. The rear ends of the right and left frame tubes 132, 134 are welded to the frame plate 130, and the right and left frame tubes 132, 134 extend toward the front. The space between the right side frame tube 132 and the left side frame tube 134 increases as going from the rear toward the front. The front wheel unit 12 is mounted at the front end of the right side frame tube 132 and the front end of the left side frame tube 134. The center frame tube 136 is disposed in the vicinity of the front wheel unit 12, the right end of the center frame tube 136 is welded to the right side frame tube 132, and the left end of the center frame tube 136 is welded to the left side frame tube 134. A cable cover 138 is attached to the right frame tube 132, and the cable cover 138 protects a power supply cable 156a (see fig. 17) that connects the battery box 8 to the right headlight 156 and the left headlight 158 and a power supply cable (not shown) that connects the battery box 8 to the motor 150.

(front wheel unit 12)

As shown in fig. 17, the front wheel unit 12 includes a right front wheel 140, a left front wheel 142, a right front wheel brake 144, a left front wheel brake 146, a brake balancer 148, a motor 150, a gear box 152, a safety brake 154, a right front headlight 156, and a left front headlight 158. The right front wheel 140 is connected to the gear box 152 via a right drive shaft 160 (see fig. 21 and 22). The right drive shaft 160 extends in the right-side axle housing 162 in the left-right direction, and is rotatably supported by the right axle housing 162 via a bearing, not shown. The right axle housing 162 is held to the right frame tube 132 by a right bracket 164 welded to the right frame tube 132. The left front wheel 142 is connected to the gear box 152 via a left drive shaft 166 (see fig. 21 and 22). The left drive shaft 166 extends in the left-right direction in the left axle housing 168, and is rotatably supported by the left axle housing 168 via a bearing, not shown. The left axle housing 168 is held to the left frame tube 134 by a left bracket 170 welded to the left frame tube 134. Further, the right axle housing 162, the right bracket 164, the left axle housing 168, and the left bracket 170 are all made of steel.

The right front wheel brake 144 includes a disc rotor 172 and a brake caliper 174. The disc rotor 172 is disposed on the left side of the right front wheel 140, and is fixed to the right front wheel 140 via the hub 140 a. The brake caliper 174 is disposed corresponding to the disc rotor 172. Brake caliper 174 is held to right bracket 164. A right brake cable 176 is connected to the brake caliper 174. The right brake cable 176 includes an inner cable 176a and an outer cable 176b surrounding the inner cable 176 a. When the inner cable 176a of the right brake cable 176 is pulled in relative to the outer cable 176b, the brake caliper 174 clamps the vicinity of the outer edge of the disc rotor 172 with a pair of brake pads, not shown, and thereby applies friction to the disc rotor 172 to apply braking to the right front wheel 140. When the inner cable 176a of the right brake cable 176 is pushed out relatively to the outer cable 176b, the pair of brake pads are separated from the disc rotor 172, thereby releasing the brake of the right front wheel 140. The right front wheel brake 144 may be a so-called disc brake as described above, or may be another type of brake, for example, a drum brake, or a band brake.

The left front wheel brake 146 includes a disc rotor 178 and a brake caliper 180. The disc rotor 178 is disposed on the right side of the left front wheel 142, and is fixed to the left front wheel 142 via the hub 142 a. The brake caliper 180 is disposed corresponding to the disc rotor 178. The brake caliper 180 is held to the left bracket 170. A left brake cable 182 is connected to the brake caliper 180. The left brake cable 182 includes an inner cable 182a and an outer cable 182b surrounding the inner cable 182a. When the inner cable 182a of the left brake cable 182 is pulled in relative to the outer cable 182b, the brake caliper 180 clamps the vicinity of the outer edge of the disc rotor 178 with a pair of brake pads, not shown, and thereby applies friction to the disc rotor 178 to apply a brake to the left front wheel 142. When the inner cable 182a of the left brake cable 182 is pushed out relatively to the outer cable 182b, the pair of brake pads are separated from the disc rotor 178, thereby releasing the brake of the left front wheel 142. The left front wheel brake 146 may be a so-called disc brake as described above, or may be another type of brake, for example, a drum brake, or a band brake.

(brake balancer 148)

As shown in fig. 18, brake balancer 148 includes a center bracket 184, a 1 st link member 186, and a 2 nd link member 188. The center bracket 184 is made of steel, and the 1 st link member 186 and the 2 nd link member 188 are made of aluminum. Center bracket 184 is welded to center frame tube 136 near the center thereof. The 1 st link member 186 and the 2 nd link member 188 are rotatably held to the center bracket 184 by a rotation shaft 190 extending in the up-down direction. The 1 st link member 186 includes an input arm 186a extending rightward and forward from the rotation shaft 190 and an output arm 186b extending rightward and rearward from the rotation shaft 190. An inner cable 94a of a brake cable 94 extending from the brake lever 49 of the left handlebar 20 is coupled to a distal end of the input arm 186 a. An inner cable 176a of the right brake cable 176 is connected to the tip of the output arm 186b. The 2 nd link member 188 includes an input arm 188a extending rightward and forward from the rotation shaft 190 and an output arm 188b extending leftward and rearward from the rotation shaft 190. An outer cable 94b of a brake cable 94 extending from the brake lever 49 of the left handlebar 20 is connected to the tip end of the input arm 188 a. An inner cable 182a of the left brake cable 182 is connected to the tip of the output arm 188b. The outer cable 176b of the right brake cable 176 and the outer cable 182b of the left brake cable 182 are both fixed to the center bracket 184. In other embodiments, the 1 st link member 186 and the 2 nd link member 188 may be rotatably held by the center bracket 184 via a rotation shaft extending in the left-right direction or the front-rear direction.

The distance from the rotation axis 190 to the tip of the input arm 186a, the distance from the rotation axis 190 to the tip of the output arm 186b, and the angles formed by the input arm 186a and the output arm 186b in the 1 st link member 186 are substantially the same as the distance from the rotation axis 190 to the tip of the input arm 188a, the distance from the rotation axis 190 to the output arm 188b, and the angles formed by the input arm 188a and the output arm 188b in the 2 nd link member 188, respectively.

As shown in fig. 19, when the user does not push up the brake lever 49 of the left handlebar 20, the inner cable 176a of the right brake cable 176 is pushed in with respect to the outer cable 176b by the 1 st link member 186, and the inner cable 182a of the left brake cable 182 is pushed in with respect to the outer cable 182b by the 2 nd link member 188. In this state, the right front wheel 140 and the left front wheel 142 are released from braking.

As shown in fig. 20, when the user pushes up the brake lever 49 of the left handlebar 20, the inner cable 94a of the brake cable 94 is pulled in opposite to the outer cable 94 b. Accordingly, the 1 st link member 186 rotates in a direction to move the input arm 186a rightward, and the output arm 186b moves leftward, so that the inner cable 176a of the right brake cable 176 is pulled out to face the outer cable 176 b. At the same time, the 2 nd link member 188 rotates in a direction to move the input arm 188a to the left, and the output arm 188b moves to the right, so that the inner cable 182a of the left brake cable 182 is pulled out to face the outer cable 182 b. Thereby, braking is applied to the right front wheel 140 and the left front wheel 142, respectively.

Due to an adjustment error between the right front wheel brake 144 and the left front wheel brake 146 and the degradation of the right brake cable 176 and the left brake cable 182, even if the right brake cable 176 and the left brake cable 182 are pulled out by the same amount, the right front wheel brake 144 and the left front wheel brake 146 may operate differently. For example, there are the following cases: when the inner cable 94a of the brake cable 94 is pulled in relative to the outer cable 94b, the brake pad is in contact with the disc rotor 172 in the right front wheel brake 144, and the brake pad is not in contact with the disc rotor 178 in the left front wheel brake 146. When the inner cable 94a of the brake cable 94 is pulled further relatively to the outer cable 94b from this state, the 1 st link member 186 does not continue to rotate, but the 2 nd link member 188 further rotates, so that the brake pad can be brought into contact with the disc rotor 178 even in the left front wheel brake 146. As described above, with the brake balancer 148 of the present embodiment, the imbalance between the tension acting on the right brake cable 176 and the tension acting on the left brake cable 182 can be absorbed by the rotational movements of the 1 st link member 186 and the 2 nd link member 188, and the braking force applied to the right front wheel brake 144 and the braking force applied to the left front wheel brake 146 can be balanced.

Further, brake balancer 148 may have a structure as shown in fig. 56. In the configuration shown in fig. 56, brake balancer 148 includes center bracket 184, 1 st link member 802, and 2 nd link member 804. The front ends of the 1 st link member 802 and the 2 nd link member 804 are rotatably held by the center bracket 184 via a rotation shaft 806 extending in the up-down direction. An inner cable 182a of the left brake cable 182 is connected to the rear end of the 1 st link member 802. An inner cable 176a of the right brake cable 176 is connected to the rear end of the 2 nd link member 804. The outer cable 176b of the right brake cable 176 and the outer cable 182b of the left brake cable 182 are both fixed to the center bracket 184. An inner cable 94a of the brake cable 94 is connected to the vicinity of the center of the 1 st link member 802. An outer cable 94b of the brake cable 94 is connected to the vicinity of the center of the 2 nd link member 804. The distance from the rotation shaft 806 to the holding position of the inner cable 94a and the distance from the rotation shaft 806 to the holding position of the inner cable 182a in the 1 st link member 802 are substantially the same as the distance from the rotation shaft 806 to the holding position of the outer cable 94b and the distance from the rotation shaft 806 to the holding position of the inner cable 176a in the 2 nd link member 804, respectively.

When the user does not push up the brake lever 49 of the left handlebar 20, the inner cable 182a of the left brake cable 182 is pushed in with respect to the outer cable 182b by the 1 st link member 802, and the inner cable 176a of the right brake cable 176 is pushed in with respect to the outer cable 176b by the 2 nd link member 804. In this state, the right front wheel 140 and the left front wheel 142 are released from braking.

When the user pushes up the brake lever 49 of the left handlebar 20, the inner cable 94a of the brake cable 94 is pulled in opposite to the outer cable 94 b. Accordingly, the 1 st link member 802 rotates rightward, and thus the inner cable 182a of the left brake cable 182 is pulled out relatively to the outer cable 182 b. At the same time, the 2 nd link member 804 rotates leftward, and thus the inner cable 176a of the right brake cable 176 is pulled out relatively to the outer cable 176 b. Thereby, braking is applied to the right front wheel 140 and the left front wheel 142, respectively. With the configuration shown in fig. 56, by the rotational movements of the 1 st link member 802 and the 2 nd link member 804, the unbalance between the tension acting on the right brake cable 176 and the tension acting on the left brake cable 182 can be absorbed, and the braking force applied to the right front wheel brake 144 and the braking force applied to the left front wheel brake 146 can be balanced.

Alternatively, brake balancer 148 may have a structure as shown in FIG. 57. In the configuration shown in fig. 57, brake balancer 148 includes center bracket 184, 1 st link member 808, and 2 nd link member 810. The 1 st link member 808 is rotatably held by the center bracket 184 via a rotation shaft 812 extending in the up-down direction. The 2 nd link member 810 is rotatably held by the center bracket 184 via a rotation shaft 814 extending in the up-down direction. An inner cable 176a of the right brake cable 176 is connected to the rear end of the 1 st link member 808. An inner cable 182a of the left brake cable 182 is coupled to the rear end of the 2 nd link member 810. The outer cable 176b of the right brake cable 176 and the outer cable 182b of the left brake cable 182 are both fixed to the center bracket 184. An inner cable 94a of the brake cable 94 is connected to the tip of the 1 st link member 808. An outer cable 94b of the brake cable 94 is connected to the distal end of the 2 nd link member 810. The distance from the rotation shaft 812 to the holding position of the inner cable 94a and the distance from the rotation shaft 812 to the holding position of the inner cable 176a in the 1 st link member 808 are substantially the same as the distance from the rotation shaft 814 to the holding position of the outer cable 94b and the distance from the rotation shaft 814 to the holding position of the inner cable 182a in the 2 nd link member 810, respectively.

When the user does not push up the brake lever 49 of the left handlebar 20, the inner cable 176a of the right brake cable 176 is pushed in with respect to the outer cable 176b by the 1 st link member 808, and the inner cable 182a of the left brake cable 182 is pushed in with respect to the outer cable 182b by the 2 nd link member 810. In this state, the right front wheel 140 and the left front wheel 142 are released from braking.

When the user pushes up the brake lever 49 of the left handlebar 20, the inner cable 94a of the brake cable 94 is pulled in opposite to the outer cable 94 b. Accordingly, the 1 st link member 808 rotates in a direction to move the front end rightward, and the rear end moves leftward, so that the inner cable 176a of the right brake cable 176 is pulled out to face the outer cable 176 b. At the same time, the 2 nd link member 810 rotates in a direction to move the front end to the left and the rear end moves to the right, so that the inner cable 182a of the left brake cable 182 is pulled out relatively to the outer cable 182 b. Thereby, braking is applied to the right front wheel 140 and the left front wheel 142, respectively. With the configuration shown in fig. 57, by the rotational movements of the 1 st link member 808 and the 2 nd link member 810, the unbalance between the tension acting on the right brake cable 176 and the tension acting on the left brake cable 182 can be absorbed, and the braking force applied to the right front wheel brake 144 and the braking force applied to the left front wheel brake 146 can be balanced.

(Motor 150)

As shown in fig. 21, the motor 150 includes a stator 192, a rotor 194, and a motor housing 196. The motor 150 is, for example, a brushless DC motor. The stator 192 and the rotor 194 are accommodated in a motor housing 196. The motor housing 196 is made of aluminum. Stator 192 is secured to motor housing 196. The rotor 194 is fixed to a motor shaft 198. The motor shaft 198 extends in the left-right direction and is rotatably held by the motor housing 196 via bearings 198a and 198 b. The left end of the motor shaft 198 is connected to the gear box 152. The right end of the motor shaft 198 protrudes outside the motor housing 196 and is connected to the safety brake 154. The motor 150 is connected to the battery box 8 via an electric power cable, not shown. The motor 150 is supplied with electric power from the battery pack 112. The operation of the motor 150 is controlled by the control board 108.

(Gear box 152)

Gearbox 152 includes a gear housing 200, a countershaft 202, a clutch mechanism 206, and a differential mechanism 208. The gear housing 200 is made of aluminum material. The right axle housing 162, the left axle housing 168, and the gear housing 200 are fixed by screw fixation. The motor housing 196 is screwed to the gear housing 200 and fixed. Further, the gear housing 200 is screwed to the center bracket 184 of the center frame tube 136 via a support bracket, not shown.

The intermediate shaft 202 extends in the left-right direction and is rotatably held by the gear housing 200 via bearings 202a and 202 b. The intermediate shaft 202 includes a 1 st gear 203, a 2 nd gear 204, and a dog clutch (dog clutch) 205. The 1 st gear 203 is fixed to the intermediate shaft 202. The 1 st gear 203 is engaged with a spur gear 198c provided on the motor shaft 198. The 1 st gear 203 includes an engagement recess 203a recessed rightward. The 2 nd gear 204 is held so as not to be movable in the left-right direction with respect to the intermediate shaft 202 but to be rotatable. The dog clutch 205 is held movable in the left-right direction but is not rotatable with respect to the 2 nd gear 204. The dog clutch 205 includes: an engagement convex portion 205a protruding rightward and engageable with the engagement concave portion 203a of the 1 st gear 203; and an engagement groove 205b extending in the circumferential direction on the outer circumferential surface of the dog clutch 205.

The clutch mechanism 206 includes a clutch lever 210, a support bracket 212, a rod 214, and a selector 216. The clutch lever 210 and the support bracket 212 are provided outside the gear housing 200. The support bracket 212 is screwed to the gear housing 200 and fixed. The clutch lever 210 is rotatably held by a support bracket 212 about a rotation shaft 210 a. The clutch lever 210 includes a cam surface 210b. The rod 214 extends in the left-right direction and penetrates from the inside to the outside in the gear housing 200. The rod 214 is slidably held in the gear housing 200 in the left-right direction. The left end of the rod 214 is disposed opposite the cam surface 210b of the clutch lever 210. A selector 216 is fixed to the right end of the rod 214. The selector 216 is engaged with the engagement groove 205b of the dog clutch 205. The rod 214 is biased leftward with respect to the gear housing 200 by a compression spring, not shown. Therefore, the left end of the rod 214 always abuts the cam surface 210b of the clutch lever 210. The cam surface 210b of the clutch lever 210 has such a shape: in a state where the clutch lever 210 is pushed down with respect to the support bracket 212 (see fig. 21), the rod 214 moves to the left, and in a state where the clutch lever 210 is pulled up with respect to the support bracket 212 (see fig. 22), the rod 214 moves to the right.

The differential mechanism 208 includes a ring gear 208a, a pinion housing 208b, a pinion shaft 208c, a pinion 208d, a right side drive gear 208e, and a left side drive gear 208f. The ring gear 208a meshes with the 2 nd gear 204 of the intermediate shaft 202. The pinion housing 208b is screwed to the ring gear 208a, fixed, and rotates integrally with the ring gear 208a. The ring gear 208a is rotatably held by the gear housing 200 via a bearing 208g, and the pinion housing 208b is rotatably held by the gear housing 200 via a bearing 208 h. The pinion shaft 208c is rotatably held by the pinion housing 208b. Pinion 208d is fixed to pinion shaft 208c. The right drive gear 208e is fixed to the right drive shaft 160 and meshes with the pinion gear 208 d. The left drive gear 208f is fixed to the left drive shaft 166 and meshes with the pinion gear 208 d.

As shown in fig. 21, in a state in which the clutch lever 210 of the clutch mechanism 206 is pushed down, the rod 214 and the selector 216 move leftward, and the engagement convex portion 205a of the dog clutch 205 is separated from the engagement concave portion 203a of the 1 st gear 203. In this state, even if the 1 st gear 203 rotates, the 2 nd gear 204 does not rotate. Therefore, the power from the motor shaft 198 is not transmitted to the ring gear 208a of the differential mechanism 208. In this case, when one of the right drive shaft 160 and the left drive shaft 166 rotates, the differential mechanism 208 rotates the other of the right drive shaft 160 and the left drive shaft 166 in the reverse direction at the same rotational speed.

As shown in fig. 22, when the clutch lever 210 of the clutch mechanism 206 is pulled up, the rod 214 and the selector 216 move rightward, and the engagement convex portion 205a of the dog clutch 205 engages with the engagement concave portion 203a of the 1 st gear 203. In this state, when the 1 st gear 203 rotates, the 2 nd gear 204 also rotates. Accordingly, power from the motor shaft 198 is transmitted to the ring gear 208a of the differential mechanism 208 via the intermediate shaft 202. In this case, the differential mechanism 208 rotates the right drive shaft 160 and the left drive shaft 166, respectively, in accordance with the power transmitted to the ring gear 208a.

(safety brake 154)

As shown in fig. 23, the safety brake 154 includes a disc rotor 218 and a brake caliper 220. A disk rotor 218 is fixed to the right end of the motor shaft 198 of the motor 150. Although not shown in fig. 23, the periphery of the disk rotor 218 is covered with a disk cover 218a (see fig. 21 and 22) fixed to the motor housing 196. The brake caliper 220 is disposed corresponding to the disc rotor 218. The brake caliper 220 is held to the motor housing 196. To the brake caliper 220, a safety cable 90 extending from the right handlebar 18 is connected. A pair of brake pads, not shown, of the brake caliper 220 are biased in a direction to sandwich the vicinity of the outer edge of the disc rotor 218 by a return spring, not shown. Therefore, when the inner cable 90a of the safety cable 90 is pushed out relatively to the outer cable 90b, the pair of brake pads sandwich the vicinity of the outer edge of the disc rotor 218, thereby causing frictional force to act on the disc rotor 218, thereby applying a brake to the motor shaft 198. When the inner cable 90a of the safety cable 90 is pulled in relative to the outer cable 90b, the pair of brake pads is separated from the disc rotor 218 against the urging force of the return spring, and the braking of the motor shaft 198 is released. The safety brake 154 may be a so-called disc brake as described above, or may be another type of brake, for example, a drum brake, or a band brake.

In a state where the right front wheel 140 and the left front wheel 142 are rotated by the power of the motor 150, the motor shaft 198 is rotated at a high rotational speed and a low torque, and the right drive shaft 160 and the left drive shaft 166 are rotated at a low rotational speed and a high torque. Therefore, compared to the case where the brake is applied to the right front wheel 140 by the right front wheel brake 144 and the brake is applied to the left front wheel 142 by the left front wheel brake 146, the torque required for braking is small when the brake is applied to the motor shaft 198 by the safety brake 154, and thus the rotation of the right front wheel 140 and the left front wheel 142 can be reliably stopped.

The motor 150, the gear case 152, and the safety brake 154 may have the structure shown in fig. 58 and 59. In this structure, the right end of the motor shaft 198 does not protrude outside the motor housing 196. A brake disc 850 is fixed to the left end of the motor shaft 198.

In the configuration shown in fig. 58 and 59, the gear box 152 includes a gear housing 200, a relay shaft 852, a differential mechanism 208, a differential lock mechanism 854, and a brake mechanism 856. In this configuration, the brake disc 850 and the brake mechanism 856 constitute a safety brake 154. The relay shaft 852 extends in the left-right direction and is rotatably held by the gear housing 200 via bearings 852a and 852 b. The relay shaft 852 includes a spur gear 852c and a spur gear 852d. The Spur gear 852c is engaged with a Spur gear (Spur gear) 198c provided to the motor shaft 198. The spur gear 852d meshes with the ring gear 208a of the differential mechanism 208.

The differential locking mechanism 854 includes a dog clutch 858 and a compression spring 860. The dog clutch 858 is held by the left drive shaft 166 so as to be slidable in the left-right direction with respect to the left drive shaft 166 and to rotate integrally with the left drive shaft 166. The dog clutch 858 includes an engagement protrusion 858a protruding rightward and an engagement groove 858b extending in the circumferential direction on the outer peripheral surface of the dog clutch 858. In this configuration, an engagement concave portion 208i that can be engaged with the engagement convex portion 858a of the dog clutch 858 is formed in the ring gear 208a of the differential mechanism 208. Compression spring 860 biases dog clutch 858 to the right (i.e., toward a direction approaching ring gear 208 a) with respect to gear housing 200.

The brake mechanism 856 includes a rod 862, a brake plate 864, and a compression spring 866. The rod 862 extends in the left-right direction, and penetrates from the inside to the outside in the gear housing 200. The rod 862 is slidably held in the gear housing 200 in the left-right direction. An inner cable 90a of the safety cable 90 is connected to the left end of the rod 862. The outer cable 90b of the safety cable 90 is coupled to the gear housing 200. A brake plate 864 is fixed to the right end of the rod 862. The brake plate 864 is provided with a brake shoe 864a arranged corresponding to the brake disc 850 and a selector 864b engaged with an engagement groove 858b of the dog clutch 858. The compression spring 866 biases the brake plate 864 to the right (i.e., in a direction toward the brake disc 850) with respect to the gear housing 200.

As shown in fig. 59, when the inner cable 90a of the safety cable 90 is pushed out relative to the outer cable 90b, the rod 862 and the brake plate 864 are moved rightward by the biasing force of the compression spring 866, and the brake shoe 864a is pressed against the brake disc 850. Thereby, frictional force acts on the brake disc 850, and braking is applied to the motor shaft 198. Further, by the selector 864b provided on the brake plate 864 being moved rightward, the claw clutch 858 is moved rightward by the biasing force of the compression spring 860, and the engagement convex portion 858a of the claw clutch 858 is engaged with the engagement concave portion 208i of the ring gear 208 a. In this case, in the differential mechanism 208, the ring gear 208a is fixed to the left drive shaft 166, and the right drive shaft 160 and the left drive shaft 166 rotate in the same direction and at the same rotation speed. The rotation of the motor shaft 198, and thus the ring gear 208a, is braked by the safety brake 154, and the rotation of the right drive shaft 160 and the left drive shaft 166 is braked.

As shown in fig. 58, when the inner cable 90a of the safety cable 90 is pulled in relative to the outer cable 90b, the rod 862 and the brake plate 864 move leftward, and the brake shoe 864a moves away from the brake disc 850. Thereby releasing the braking of the motor shaft 198. Further, when the selector 864b provided on the brake plate 864 is moved leftward, the dog clutch 858 is moved leftward, and the engagement protrusion 858a of the dog clutch 858 is disengaged from the engagement recess 208i of the ring gear 208 a. In this case, the differential mechanism 208 rotates the right drive shaft 160 and the left drive shaft 166, respectively, in accordance with the power transmitted from the motor shaft 198 to the ring gear 208a via the relay shaft 852.

(Right headlight 156 and left headlight 158)

As shown in fig. 17, right headlamp 156 is held to right bracket 164. The right headlight 156 is connected to the battery box 8 via a power supply cable 156 a. Left headlamp 158 is held to left bracket 170. Left headlamp 158 is connected to right headlamp 156 via a relay cable 158 a. The right and left headlights 156 and 158 are supplied with power from the battery pack 112. The operation of the right and left headlights 156 and 158 is controlled by the control substrate 108.

(rear wheel unit 14)

As shown in fig. 24, 25 and 26, the rear wheel unit 14 includes a base plate 222, a hinge 224, a right caster 226 and a left caster 228. The base plate 222 and the hinge 224 are both made of steel. The base plate 222 includes a web 222a extending in the front-rear direction and the left-right direction, a front flange 222b bent downward from the front end of the web 222a, and a rear flange 222c bent downward from the rear end of the web 222 a. The hinge 224 includes a support pipe 224a extending in the front-rear direction, a front support plate 224b in the up-down direction and the left-right direction, and a rear support plate 224c in the up-down direction and the left-right direction. The front support plate 224b is formed in a substantially triangular shape, and the front support plate 224b is welded to the vicinity of the front end of the support tube 224a in a state where the support tube 224a penetrates the center of the front support plate 224 b. The rear support plate 224c is formed in a substantially triangular shape, and the rear support plate 224c is welded to the vicinity of the rear end of the support tube 224a in a state where the support tube 224a penetrates the center of the rear support plate 224c. The lower ends of the front side support plates 224b and the rear side support plates 224c are welded to the upper surface of the web 222a of the base plate 222. In the following description, the base plate 222 and the hinge 224 are also collectively referred to as a rear wheel frame 225.

(Right castor 226)

The right caster 226 includes a center pin 230, a top plate 232, a bracket 234, an axle 236, a right rear wheel 238, and a locking mechanism 240.

As shown in fig. 27, the center pin 230 penetrates the web 222a of the base plate 222 in the up-down direction. The center pin 230 is rotatably held by a top plate 232 via a bearing 230 a. The top plate 232 is screwed to the base plate 222 in a state where the upper surface of the top plate 232 is in contact with the lower surface of the web 222a of the base plate 222, and is fixed. The bracket 234 includes a retainer 234a, a right side arm 234b, and a left side arm 234c. The holder 234a, the right side arm 234b, and the left side arm 234c are integrally formed. The center pin 230 penetrates the holder 234a in the up-down direction. The holder 234a is fixed to the lower end of the center pin 230. The holder 234a is rotatably held by the top plate 232 via a bearing 234 d. The right side arm 234b extends rearward and downward from the right end of the holder 234a. The left side arm 234c extends rearward and downward from the left end of the holder 234a.

As shown in fig. 28, the axle 236 extends in the left-right direction. The wheel shaft 236 is composed of a bolt 236a and a nut 236b, the bolt 236a penetrates from the tip side of the left side arm 234c to the tip side of the right side arm 234b, and the nut 236b is screwed to the bolt 236a from the tip side of the right side arm 234 b. The right end of the axle 236 is fixed to the top end of the right side arm 234b, and the left end of the axle 236 is fixed to the top end of the left side arm 234c. The right rear wheel 238 includes a 1 st right rear wheel 238a and a 2 nd right rear wheel 238b. The 1 st right rear wheel 238a is rotatably held by the wheel shaft 236 via a bearing 238 c. The 2 nd right rear wheel 238b is rotatably held by the axle 236 via a bearing 238 d. That is, the 1 st right rear wheel 238a and the 2 nd right rear wheel 238b are rotatable independently of each other about the rotation axis RX2, which is the central axis of the wheel axle 236. The diameter of the 1 st right rear wheel 238a and the diameter of the 2 nd right rear wheel 238b are, for example, 200mm, and the width of the 1 st right rear wheel 238a and the width of the 2 nd right rear wheel 238b are, for example, 100mm. The spacing between the 1 st right rear wheel 238a and the 2 nd right rear wheel 238b is, for example, 6mm±2mm.

As shown in fig. 61, the wheel shaft 236 may be configured by a sleeve 236c, a bolt 236d, and a bolt 236e, wherein the sleeve 236c is inserted from the distal end side of the left side arm 234c to the distal end side of the right side arm 234b, and an internal thread is formed on the inner surface, the bolt 236d is screwed to the sleeve 236c from the distal end side of the right side arm 234b, and the bolt 236e is screwed to the sleeve 236c from the distal end side of the left side arm 234 c. As shown in fig. 28, in the case where the wheel shaft 236 is constituted by the bolt 236a and the nut 236b, when the nut 236b is screwed with the bolt 236a, the tip of the bolt 236a protrudes from the nut 236b, so that the protruding amount of the wheel shaft 236 from the bracket 234 becomes large, and there is a possibility that the aesthetic appearance of the product is impaired. As shown in fig. 61, by configuring the wheel axle 236 with the sleeve 236c and the bolts 236d, 236e, the protruding amount of the wheel axle 236 from the bracket 234 can be reduced, and the aesthetic appearance of the product can be improved.

In the right caster 226, the bracket 234, the wheel axle 236, and the right rear wheel 238 are integrally rotated with respect to the top plate 232 about a rotation axis RX1 as a central axis of the center pin 230. Accordingly, the traveling direction of the right rear wheel 238 can be changed in accordance with the traveling direction of the rear wheel unit 14.

As shown in fig. 34 and 35, when the right caster 226 is viewed from above, the rotation axis RX2, which is the central axis of the wheel shaft 236, is arranged to be offset from the rotation axis RX1, which is the central axis of the center pin 230. The distance from the rotation axis RX1 to the rotation axis RX2 when the right caster 226 is viewed from above is, for example, in the range of 50mm to 60mm, for example, 55mm.

As shown in fig. 27, the locking mechanism 240 includes a locking pin 242, a support plate 244, and a compression spring 246. The lock pin 242 is a rod-shaped member having a substantially L-shape. The lock pin 242 includes a 1 st shaft portion 242a extending in the up-down direction and a 2 nd shaft portion 242b bent from an upper end of the 1 st shaft portion 242 a. The support plate 244 is screwed to the upper surface of the web 222a of the base plate 222. As shown in fig. 29, the support plate 244 includes a through hole 244a through which the 1 st shaft 242a of the lock pin 242 passes in the up-down direction. A 1 st holding portion 244b and a 2 nd holding portion 244c are formed at the upper end of the support plate 244, the 1 st holding portion 244b holding the 2 nd shaft portion 242b of the lock pin 242 at a 1 st height, and the 2 nd holding portion 244c holding the 2 nd shaft portion 242b of the lock pin 242 at a 2 nd height lower than the 1 st height. As shown in fig. 27, the compression spring 246 biases the lock pin 242 downward with respect to the support plate 244.

As shown in fig. 30 and 31, a through hole 232a is formed in the top plate 232 through which the 1 st shaft 242a of the lock pin 242 passes. The retaining members 234a of the bracket 234 are provided with engagement grooves 234e at predetermined angular intervals, in which the 1 st shaft 242a of the lock pin 242 is engaged. As shown in fig. 30, in a state where the 2 nd shaft portion 242b of the lock pin 242 is held by the 1 st holding portion 244b of the support plate 244, the 1 st shaft portion 242a of the lock pin 242 penetrates the through hole 232a of the top plate 232, but does not engage with the engagement groove 234e of the bracket 234. In this state, the integral turning motion of the bracket 234, the wheel axle 236, and the right rear wheel 238 with respect to the top plate 232 is allowed. The position of the lock pin 242 in this state is also referred to as an unlock position. As shown in fig. 31, in a state where the 2 nd shaft portion 242b of the lock pin 242 is held by the 2 nd holding portion 244c of the support plate 244, the 1 st shaft portion 242a of the lock pin 242 penetrates the through hole 232a of the top plate 232 and is engaged with the engagement groove 234e of the bracket 234. In this state, the integral turning motion of the bracket 234, the wheel axle 236, and the right rear wheel 238 with respect to the top plate 232 is prohibited. The position of the lock pin 242 in this state is also referred to as a lock position. The user of the truck 2 can switch between a state in which the integral turning operation of the bracket 234, the wheel axle 236, and the right rear wheel 238 with respect to the top plate 232 is prohibited and a state in which the integral turning operation of the bracket 234, the wheel axle 236, and the right rear wheel 238 with respect to the top plate 232 is permitted by switching the position of the lock pin between the lock position and the unlock position.

Fig. 32 shows the positional relationship of the center pin 230, the wheel axle 236, and the wheel 238e when the right caster 226 is viewed from above, with respect to the case where the right rear wheel 238 is assumed to include only a single wheel 238 e. For example, when the right rear wheel 238 collides with the step S obliquely, as shown in fig. 33, the wheel axle 236 and the wheel 238e are rotated so that the traveling direction of the wheel 238e is opposite to the step S, and the wheel axle easily passes over the step S. However, with respect to the step S shown in fig. 32, the direction of the torque T generated by the force received from the step S by the wheel 238e acts in the opposite direction to the above-described rotation direction, and therefore, as shown in fig. 60, the wheel 238e rotates so that the side surface of the wheel 238e hits the step S. If the wheel 238e rotates in this way, it cannot pass over the step S.

In contrast, in the truck 2 of the present embodiment, as shown in fig. 34, the right rear wheel 238 includes a 1 st right rear wheel 238a and a 2 nd right rear wheel 238b. For example, when the right rear wheel 238 collides with the step S obliquely, as shown in fig. 35, the 1 st right rear wheel 238a and the 2 nd right rear wheel 238b turn so that the traveling direction of the 1 st right rear wheel 238a and the traveling direction of the 2 nd right rear wheel 238b face the step S, and easily pass over the step S. In the present embodiment, the direction of the torque T generated by the force received by the 2 nd right rear wheel 238b acts in the same direction as the above-described rotational direction with respect to the step S shown in fig. 34, and therefore the step S can be easily passed over.

In the truck 2 of the present embodiment, the 1 st right rear wheel 238a and the 2 nd right rear wheel 238b are independently rotatable with respect to the wheel axle 236. Therefore, as shown in fig. 34, when the right rear wheel 238 collides with the step S obliquely, for example, the 2 nd right rear wheel 238b contacts the step S, the 1 st right rear wheel 238a which does not contact the step S is rotated relatively to the 2 nd right rear wheel 238b, whereby the traveling direction of the right rear wheel 238 can be easily changed to the direction opposite to the step S as shown in fig. 35, and the step S can be easily crossed.

(left castor 228)

Similarly to the right caster 226, the left caster 228 includes a center pin 250, a top plate 252, a bracket 254, a shaft 256, a left rear wheel 258, and a locking mechanism 260. The bracket 254 includes a retainer 254a, a right side arm 254b, and a left side arm 254c. The left rear wheels 258 include a 1 st left rear wheel 258a and a 2 nd left rear wheel 258b. The locking mechanism 260 includes a locking pin 262, a support plate 264, and a compression spring 266. The left caster 228 has the same structure as the right caster 226 turned right and left, and therefore, a detailed description thereof is omitted.

(connection part of rear wheel unit 14 and chassis frame 10)

As shown in fig. 36, the rear wheel unit 14 is coupled to the chassis frame 10 via a coupling shaft 270 extending in the front-rear direction. As shown in fig. 37, a connecting pipe 272 and a support plate 274 are welded to the lower surface of the frame plate 130 of the chassis frame 10. The connecting tube 272 extends in the front-rear direction, the front end of the connecting tube 272 penetrates the support plate 274, and the rear end of the connecting tube 272 penetrates the rear side flange 130c. The coupling shaft 270 includes a head portion 270a and a shaft portion 270b. The shaft portion 270b of the coupling shaft 270 is inserted into the support pipe 224a of the rear wheel unit 14 from the rear, penetrates the support pipe 224a, and further penetrates the coupling pipe 272 of the chassis frame 10. The front end of the coupling shaft 270 is fixed to a support plate 274 by a coupling pin 276.

The support tube 224a is slidable with respect to the coupling shaft 270. Therefore, as shown in fig. 38, the rear wheel unit 14 is swingably held to the chassis frame 10 about a swing axis PX, which is a central axis of the coupling shaft 270. By adopting such a configuration, the rear wheel unit 14 swings with respect to the chassis frame 10 when the truck 2 travels on uneven ground, and thus the following performance with respect to the road surface can be improved. As shown in fig. 10, when the chassis unit 4 is viewed from the rear plane, the swing axis PX of the rear wheel unit 14 is disposed above a straight line L passing through the upper end of the right rear wheel 238 and the upper end of the left rear wheel 258. Therefore, the lowest ground clearance can be ensured, and the vibration of the chassis frame 10 at the time of traveling of the truck 2 can be suppressed. Further, as shown in fig. 38, a rear side edge 130c of the chassis frame 10 is formed with: a right stopper surface 130d disposed on the right side of the connecting shaft 270; and a left stopper surface 130e disposed on the left side of the connecting shaft 270. The right stopper surface 130d has a shape that goes from the left to the right and then goes from the lower to the upper. When the rear wheel unit 14 swings relative to the chassis frame 10 in a direction to move the right rear wheel 238 upward, the right side stopper surface 130d abuts against the bottom plate 130a of the chassis frame 10, thereby restricting the swing angle of the rear wheel unit 14 relative to the chassis frame 10. The left stopper surface 130e has a shape that goes from the right to the left and then goes from the lower to the upper. When the rear wheel unit 14 swings relative to the chassis frame 10 in a direction to move the left rear wheel 258 upward, the left side stopper surface 130e abuts against the bottom plate 130a of the chassis frame 10, thereby restricting the swing angle of the rear wheel unit 14 relative to the chassis frame 10. In other embodiments, the rear wheel unit 14 may be held to the chassis frame 10 so as not to be swingable about the swing axis PX with respect to the chassis frame 10.

In the chassis unit 4 of the present embodiment, the right front wheel 140 and the left front wheel 142 are driving wheels, and the right rear wheel 238 and the left rear wheel 258 are non-driving wheels. In another embodiment, the right front wheel 140 and/or the left front wheel 142 may be non-driven wheels and the right rear wheel 238 and/or the left rear wheel 258 may be driven wheels. In still another embodiment, one of the front wheel unit 12 and the rear wheel unit 14 may be provided with only one wheel, and the other of the front wheel unit 12 and the rear wheel unit 14 may be provided with a plurality of wheels. In still another embodiment, the following structure is also possible: the chassis unit 4 does not include the rear wheel unit 14, and the front wheel unit 12 includes only one drive wheel. In still other embodiments, the chassis unit 4 may be provided with tracks driven by a prime mover instead of the right front wheel 140, the left front wheel 142, the right rear wheel 238 and the left rear wheel 258.

In the chassis unit 4 of the present embodiment, the motor 150 is a prime mover that rotates the drive wheels, and the motor 150 is driven by electric power from the battery pack 112 of the battery box 8. In another embodiment, the prime mover that rotates the drive wheels may be an engine. In still another embodiment, the motor 150 may be driven by electric power supplied from an external power source via an electric wire. In yet another embodiment, the motor 150 may be a motor other than a brushless motor, such as a brush motor. In still other embodiments, the motor 150 may be an in-wheel motor provided corresponding to each driving wheel.

The chassis unit 4 of the present embodiment includes a right handlebar 18 and a left handlebar 20, the right handlebar 18 and the left handlebar 20 extend in the vertical direction on the right and left sides of the operator, the respective upper ends are bent rearward, and grip portions 38, 48 are provided at the respective rear ends. In another embodiment, the chassis unit 4 may be provided with a so-called ring-shaped handle bar, in which the support portions of the ring-shaped handle bar extend in the vertical direction on the right and left sides of the operator, and the upper ends of the support portions are connected by grip portions extending in the horizontal direction. In this case, the tail lamp 74 may be provided at the right side support portion and the left side support portion of the operator, or may be provided near the end portion of the grip portion extending in the left-right direction. Alternatively, the chassis unit 4 may include a so-called T-shaped handlebar, in which a support portion of the T-shaped handlebar extends in the up-down direction at the center in the left-right direction, and an upper end of the support portion is connected to a grip portion extending in the left-right direction. In this case, the tail lamp 74 may be provided near the end portion of the grip portion extending in the left-right direction.

(1 st shelf unit 300)

As shown in fig. 39 and 40, the 1 st shelf unit 300 includes a shelf 302, a right side rail 304, a left side rail 306, a front side rail 308, a rear side rail 310, a 1 st arm 312, a 2 nd arm 314, an actuator 316, and a support pedestal 318. The mount 318 of the 1 st shelf unit 300 is fixed to the chassis unit 4 by screw fastening. In the 1 st shelf unit 300, the shelf 302 can be moved in the up-down direction with respect to the support base 318 by driving the actuator 316.

As shown in fig. 39, 40 and 41, the pallet 302 includes a pallet plate 320, a right side channel 322, a left side channel 324, a reinforcing channel 326, a right side rail retaining portion 328, a left side rail retaining portion 330 and a front side rail retaining portion 332. The deck plate 320, right side channel 322, left side channel 324, reinforcement channel 326, right side rail retaining portion 328, left side rail retaining portion 330, and front side rail retaining portion 332 are all made of steel. The deck boards 320 include: a substantially rectangular top plate 320a having a longitudinal direction along the front-rear direction and the left-right direction; a right side wing edge 320b bent downward from the right end of the top plate 320 a; a left side wing edge 320c bent downward from the left end of the top plate 320 a; front side wing edge 320d bent downward from the front end of top plate 320 a; and a rear side wing edge 320e bent downward from the rear end of the top plate 320 a. The upper surface of the top plate 320a forms a flat mounting surface. The right and left side channel brackets 322, 324 extend in a fore-and-aft direction along the lower surface of the top plate 320a between the front side flange 320d and the rear side flange 320e and are welded to the shelf plate 320. The right side groove shelf 322 has a sectional shape opening toward the left side, and the left side groove shelf 324 has a sectional shape opening toward the right side. The reinforcing channel 326 extends in the left-right direction along the lower surface of the top plate 320a between the right side flange 320b and the right side channel 322 and between the left side flange 320c and the left side channel 324, and is welded to the shelf plate 320. The right side rail holding portion 328 is welded to the right side surface of the right side wing edge 320 b. The right side fence holding portion 328 is disposed near the connection portion between the reinforcing groove 326 and the right side wing edge 320 b. The left guardrail holding portion 330 is welded to the left side surface of the left side flange 320 c. The left guardrail holding portion 330 is disposed near the connection portion between the reinforcing groove 326 and the left side flange 320 c. The front side rail holding portion 332 is welded to the front surface of the front side wing edge 320 d. The front side rail holding portion 332 is disposed near the connection point between the right side frame 322 and the front side edge 320d and near the connection point between the left side frame 324 and the front side edge 320 d.

The right side guard rail 304 includes a guard tube 304a and a support tube 304b. The protection tube 304a and the support tube 304b are each made of steel. The protection pipe 304a extends in the front-rear direction and is bent downward at the front and rear ends. The support pipe 304b extends in the up-down direction, and an upper end of the support pipe 304b is welded to a lower surface of the protection pipe 304 a. The left side rail 306 includes a protective tube 306a and a support tube 306b. The protection tube 306a and the support tube 306b are both made of steel. The protection tube 306a extends in the front-rear direction and is bent downward at the front and rear ends. The support tube 306b extends in the up-down direction, and the upper end of the support tube 306b is welded to the lower surface of the protection tube 306 a. The front side rail 308 includes a protective tube 308a and a support tube 308b. The protection tube 308a and the support tube 308b are both made of steel. The protection tube 308a extends in the left-right direction and is bent downward at the right and left ends. The support tube 308b extends in the up-down direction, and the upper end of the rear side fence 310 is welded to the lower surface of the protection tube 308 a. The rear side fence 310 includes a protection tube 310a and a protection plate 310b. The protection tube 310a and the protection plate 310b are both made of steel. The protection tube 310a extends in the left-right direction, and is bent downward at the right and left ends, and the respective tips of the bent portions are fixed to the rear side wing edge 320e of the deck plate 320. The protection plate 310b is along the up-down direction and the left-right direction, and the left and right ends are welded to the protection tube 310a.

As shown in fig. 42, the right guardrail holding portion 328 has a substantially square tubular shape, and includes an upper opening 328a and a lower opening 328b. The dimension of the inner space of the right side fence holding portion 328 in the left-right direction is slightly larger than the outer diameter of the support pipe 304b of the right side fence 304, and the dimension of the inner space of the right side fence holding portion 328 in the front-rear direction is twice larger than the outer diameter of the support pipe 304b of the right side fence 304. A support plate 328c is formed at a front lower portion of the right side rail holding portion 328 in the front-rear direction and the left-right direction. A flange 328d bent upward is formed at the rear end of the support plate 328c. A right opening 328e is formed continuously from the lower opening 328b on the right side surface of the right guardrail holding portion 328. A drop-off preventing screw 304c is mounted near the lower end of the support tube 304b of the right side guard rail 304. The drop-off preventing screw 304c is attached to the support pipe 304b through the right opening 328e in a state where the support pipe 304b is inserted into the right guardrail holding portion 328 from above. When the support pipe 304b is to be pulled out from above the right guard rail holding portion 328, the drop-off preventing screw 304c engages with the edge of the right opening 328e, thereby preventing the support pipe 304b from being pulled out from the right guard rail holding portion 328. Further, a rubber 328f is provided on the inner surface of the right side guard rail holding portion 328, and the rubber 328f suppresses damage to the right side guard rail holding portion 328 due to contact with the support pipe 304b.

As shown in fig. 42, in a state where the lower end of the support pipe 304b is in contact with the support plate 328c, the right guard rail 304 is held by the right guard rail holding portion 328 at a position where the upper end of the guard pipe 304a is higher than the upper surface of the top plate 320a, as shown in fig. 39. In this state, the right side rail 304 can prevent the goods placed on the shelf board 320 from falling from the right side. The state of the right side guard rail 304 shown in fig. 42 is also referred to as a 1 st state.

When the right guard rail 304 is lifted upward from the 1 st state shown in fig. 42, moved rearward and then moved downward, the support pipe 304b penetrates the right guard rail holding portion 328, and the lower surface of the protection pipe 304a abuts against the edge of the upper opening 328a of the right guard rail holding portion 328, as shown in fig. 43. In this case, as shown in fig. 44, the right side rail 304 is held by the right side rail holding portion 328 at a position where the upper end of the protection pipe 304a is lower than the upper surface of the top plate 302 a. In this state, the right side rail 304 does not interfere with loading and unloading of the cargo onto and from the cargo bed plate 320, and the workability of loading and unloading can be improved. The state of the right side fence 304 shown in fig. 43 is also referred to as the 2 nd state. When the right guard rail 304 is lifted upward from the 2 nd state shown in fig. 43, moved forward, and then moved downward, the 1 st state shown in fig. 42 can be obtained. In addition, in the 1 st shelf unit 300 of the present embodiment, since the flange 328d is provided at the rear end of the support plate 328c, the right side rail 304 is not accidentally changed from the 1 st state shown in fig. 42 to the 2 nd state shown in fig. 43.

With the present embodiment, the height of the right side rail 304 relative to the deck plate 320 can be changed by moving the right side rail 304 not in the left-right direction but in the front-rear direction and the up-down direction relative to the deck plate 320. For example, in the 1 st state shown in fig. 42, the distance between the right side rail 304 and the shelf plate 320 is 30mm±5mm when the 1 st shelf unit 300 is viewed from above, and in the 2 nd state shown in fig. 43, the distance between the right side rail 304 and the shelf plate 320 is 30mm±5mm when the 1 st shelf unit 300 is viewed from above. In addition, the distance between the right side rail 304 and the shelf plate 320 when the 1 st shelf unit 300 is viewed from above at the time of transition from the 1 st state shown in fig. 42 to the 2 nd state shown in fig. 43 and at the time of transition from the 2 nd state shown in fig. 43 to the 1 st state shown in fig. 42 is changed within a range of ±5mm. By adopting such a configuration, the height of the right side rail 304 with respect to the deck plate 320 can be changed even in a situation where a large working space is not provided in the left-right direction. In addition, in both the 1 st state shown in fig. 42 and the 2 nd state shown in fig. 43, a space for receiving the fingers of the user is ensured between the right side rail 304 and the shelf board 320, and therefore, the user can easily hold the right side rail 304.

In addition, with the present embodiment, the height of the right side rail 304 relative to the deck plate 320 can be changed while the angle of the right side rail 304 relative to the deck plate 320 is substantially unchanged. For example, in the 1 st state shown in fig. 42, the right side rail 304 has an angle of 90 degrees±3 degrees with respect to the deck plate 320, and in the 2 nd state shown in fig. 43, the right side rail 304 has an angle of 90 degrees±3 degrees with respect to the deck plate 320. The change in angle of the right side rail 304 with respect to the deck plate 320 at the time of transition from the 1 st state shown in fig. 42 to the 2 nd state shown in fig. 43 and at the time of transition from the 2 nd state shown in fig. 43 to the 1 st state shown in fig. 42 is within ±3 degrees. By adopting such a configuration, the height of the right side rail 304 with respect to the deck plate 320 can be changed even in a situation where a large working space is not provided in the left-right direction.

The left guardrail holding portion 330 has the same structure as the right guardrail holding portion 328. In the state shown in fig. 39, the left side rail 306 is held by the left side rail holding portion 330 at a position where the upper end of the protection pipe 306a is higher than the upper surface of the top plate 320 a. When the left side rail 306 is moved rearward in a state of being lifted upward from this state and then moved downward, the left side rail 306 is held by the left side rail holding portion 330 at a position where the upper end of the protection pipe 306a is lower than the upper surface of the top plate 302a, as shown in fig. 44. Further, when the left side rail 306 is lifted upward from the state shown in fig. 44, moved forward, and then moved downward, the state shown in fig. 39 can be obtained.

The front side guard rail holding portion 332 also has the same structure as the right side guard rail holding portion 328. In the state shown in fig. 39, the front side fence 308 is held by the front side fence holding portion 332 at a position where the upper end of the protection pipe 308a is higher than the upper surface of the top plate 320 a. When the front rail 308 is moved leftward and downward in a state lifted upward from this state, the front rail 308 is held by the front rail holding portion 332 at a position where the upper end of the protection pipe 308a is lower than the upper surface of the top plate 302a, as shown in fig. 44. Further, when the front side rail 308 is lifted upward from the state shown in fig. 44, moved rightward, and then moved downward, the state shown in fig. 39 can be obtained.

As shown in fig. 41, the support base 318 includes a right side channel 334, a left side channel 336, a front side panel 338, a rear side panel 340, and a reinforcement frame 342. The right side channel 334, the left side channel 336, the front side panel 338, the rear side panel 340, and the reinforcement frame 342 are all made of steel. The right side groove frame 334 and the left side groove frame 336 extend in the front-rear direction. The right side groove frame 334 has a sectional shape opening toward the left side, and the left side groove frame 336 has a sectional shape opening toward the right side. Front side plate 338 is welded to the front end of right side channel 334 and the front end of left side channel 336, respectively. The rear side plate 340 is welded to the rear end of the right side channel 334 and the rear end of the left side channel 336, respectively. As shown in fig. 40, the 1 st shelf unit 300 is fixed to the chassis unit 4 by screwing the front side plate 338 to the right and left brackets 164, 170 of the front wheel unit 12 and screwing the rear side plate 340 to the frame plate 130 of the chassis frame 10. The reinforcement frame 342 extends in the left-right direction, is welded at the right end to the right side channel 334, and is welded at the left end to the left side channel 336.

As shown in fig. 41, the 1 st arm 312 and the 2 nd arm 314 are rotatably coupled to each other with the left-right direction as a rotation axis. Arm 1 312 and arm 2 314 are each made of steel. The lower end of the 1 st arm 312 is rotatably held near the front end of the right side groove frame 334 and near the front end of the left side groove frame 336 of the support base 318 with the left-right direction as the rotation axis. The 1 st arm 312 has rollers 312a and 312b at the upper end thereof. The rollers 312a, 312b are held to the right side channel 322 and the left side channel 324 of the pallet 302. The upper end of the 2 nd arm 314 is rotatably held near the front end of the shelf plate 320 of the shelf 302 with the left-right direction as the rotation axis. The 2 nd arm 314 includes rollers 314a and 314b at the lower end (see fig. 40). The rollers 314a, 314b are held to the right side channel 334 and the left side channel 336 of the support block 318. A reinforcing frame 344 is welded to the 1 st arm 312.

The actuator 316 is a linear actuator capable of performing a shortening operation and an extension operation, and is, for example, a hydraulic cylinder. One end of the actuator 316 is rotatably held by the reinforcement frame 342 of the support base 318 with the left-right direction as a rotation axis. The other end of the actuator 316 is rotatably held by the reinforcing frame 344 of the 1 st arm 312 with the left-right direction as a rotation axis. The actuator 316 is connected to the battery box 8 via an unillustrated power cable. The actuator 316 is supplied with electric power from the battery pack 112. The operation of the actuator 316 is controlled by the control substrate 108. When the actuator 316 performs the shortening operation, the 1 st arm 312 rotates in a direction to bring the upper end of the 1 st arm 312 into close contact with the support base 318, and the 2 nd arm 314 rotates in a direction to bring the lower end of the 2 nd arm 314 into close contact with the shelf 302, whereby the shelf 302 is lowered relative to the support base 318 as shown in fig. 39. When the actuator 316 is operated to extend, the 1 st arm 312 rotates in a direction to move the upper end of the 1 st arm 312 away from the support base 318, and the 2 nd arm 314 rotates in a direction to move the lower end of the 2 nd arm 314 away from the shelf 302, whereby the shelf 302 is raised relative to the support base 318 as shown in fig. 40. During the time when the user presses the upper side of the shelf operation switch 120e, the control board 108 controls the actuator 316 to perform the extension motion. In addition, during the time when the user presses the lower side of the shelf operation switch 120e, the control board 108 controls the actuator 316 to perform the shortening operation.

(2 nd shelf unit 400)

As shown in fig. 45, 46 and 47, the 2 nd shelf unit 400 includes a hopper 402, a hopper support base 404, a support arm 406, a movable support base 408, an actuator 410 and a fixed support base 412. The fixing support base 412 of the 2 nd shelf unit 400 is fixed to the chassis frame 10 by screw fixation. In the 2 nd shelf unit 400, the movable mount 408 can be tilted with respect to the fixed mount 412 by driving the actuator 410 as shown in fig. 46. In the 2 nd pallet unit 400, the user can tilt the hopper 402 with respect to the fixed support base 412 as shown in fig. 47 by tilting the hopper support base 404 with respect to the movable support base 408.

The hopper 402 has a box shape with an upper opening. As shown in fig. 48, the hopper support base 404 includes a base plate 416, a base tube 418, an upper side frame 420, a lower side frame 422, a handle 424, and a latch mechanism 426. The base plate 416, base pipe 418, upper side frame 420 and lower side frame 422 are all made of steel. The base plate 416 is disposed along the front-rear direction and the left-right direction. The base pipe 418 extends along a lower surface of a front lower portion of the hopper 402 and extends in the front-rear direction along a lower surface of the base plate 416. A base pipe 418 is screwed to the front lower portion of the hopper 402 and is screwed to the base plate 416. The upper frame 420 is disposed between the lower surface of the rear lower portion of the hopper 402 and the upper surface of the base plate 416 in the front-rear direction and the up-down direction. The upper frame 420 is screwed to the rear lower portion of the hopper 402 and screwed to the base plate 416. The lower side frame 422 extends in the front-rear direction along the lower surface of the base plate 416. The lower frame 422 is welded to the base plate 416. The handle 424 is disposed at a position rearward of the hopper 402. The handle 424 is threadably secured to the lower frame 422. A latch mechanism 426 is provided below the handle 424. The latch mechanism 426 is fixed to the base plate 416 and the lower side frame 422.

The movable support 408 includes a right side frame 428, a left side frame 430, a front side frame 432, a rear side frame 434, and a latch receiver 436. The right side frame 428, left side frame 430, front side frame 432, and rear side frame 434 are all made of steel. The right side frame 428 and the left side frame 430 extend in the front-rear direction. The front end of the right side frame 428 and the front end of the left side frame 430 are rotatably coupled to the front end of the lower side frame 422 of the hopper support base 404 with the left-right direction as a rotation axis. The front side frame 432 extends in the left-right direction between the vicinity of the front end of the right side frame 428 and the vicinity of the front end of the left side frame 430. Front side frame 432 is welded to right side frame 428 and left side frame 430. The rear side frame 434 extends in the left-right direction between the rear end of the right side frame 428 and the rear end of the left side frame 430. Rear side frame 434 is welded to right side frame 428 and left side frame 430. The latch receiver 436 is fixed near the center of the rear side frame 434. The latch receiver 436 is disposed at a position corresponding to the latch mechanism 426 of the hopper support base 404. When the magazine support 404 is tilted relative to the movable support 408 in a direction such that the rear end of the magazine support 404 approaches the rear end of the movable support 408, the latch mechanism 426 engages with the latch receiver 436. The latch mechanism 426 includes a latch release knob 426a. When the user operates the latch release knob 426a in a state where the latch mechanism 426 is engaged with the latch receiver 436, the engagement between the latch mechanism 426 and the latch receiver 436 is released.

The fixed bearing block 412 includes a right side channel frame 438, a left side channel frame 440, a front side plate 442, a rear side plate 444, and a reinforcement frame 446. The right side channel 438, the left side channel 440, the front side plate 442, the rear side plate 444, and the reinforcement frame 446 are all made of steel. The right side groove shelf 438 and the left side groove shelf 440 extend in the front-rear direction. The right side groove shelf 438 has a sectional shape that opens toward the left side, and the left side groove shelf 440 has a sectional shape that opens toward the right side. The front side plate 442 is welded to the front end of the right side channel 438 and the front end of the left side channel 440, respectively. The rear side plate 444 is welded to the rear end of the right side channel frame 438 and the rear end of the left side channel frame 440, respectively. As shown in fig. 46 and 47, the 2 nd shelf unit 400 is fixed to the chassis unit 4 by screwing the front side plate 442 to the right side bracket 164 and the left side bracket 170 of the front wheel unit 12, and screwing the rear side plate 444 to the frame plate 130 of the chassis frame 10. The reinforcement frame 446 extends in the left-right direction, is welded to the right side channel 438 at the right end, and is welded to the left side channel 440 at the left end.

As shown in fig. 48, the upper end of the support arm 406 is rotatably coupled to the vicinity of the front end of the lower frame 422 of the hopper support base 404 with the horizontal direction as the rotation axis. The support arm 406 is made of steel. The lower end of the support arm 406 is provided with rollers 406a and 406b. Rollers 406a, 406b are held to right side channel 438 and left side channel 440 of fixed support block 412.

The actuator 410 is a linear actuator capable of performing a shortening operation and an extension operation, and is, for example, a hydraulic cylinder. One end of the actuator 410 is rotatably held by the reinforcing frame 446 of the fixed support 412 with the left-right direction as a rotation axis. The other end of the actuator 410 is rotatably held by a front frame 432 of the movable support 408 with the left-right direction as a rotation axis. The actuator 410 is connected to the battery box 8 of the chassis unit 4 via an unillustrated power cable. The actuator 410 is supplied with electric power from the battery pack 112. The operation of the actuator 410 is controlled by the control substrate 108. When the actuator 410 performs the shortening operation, the movable support 408 rotates relative to the fixed support 412 in a direction to bring the rear end of the movable support 408 into close contact with the rear end of the fixed support 412, whereby the movable support 408 and the hopper support 404 are brought into a state substantially parallel to the fixed support 412 as shown in fig. 45. When the actuator 410 performs an extension operation, the movable support 408 rotates relative to the fixed support 412 in a direction to separate the rear end of the movable support 408 from the rear end of the fixed support 412, and thereby, as shown in fig. 46, the movable support 408 and the hopper support 404 are inclined relative to the fixed support 412. During the time when the user presses the upper side of the shelf operation switch 120e, the control board 108 controls the actuator 410 to perform the extension motion. In addition, during the time when the user presses the lower side of the shelf operation switch 120e, the control board 108 controls the actuator 410 to perform the shortening operation. Further, from the state shown in fig. 46, the user operates the latch release knob 426a to release the engagement between the latch mechanism 426 and the latch receiver 436, and further, the user holds the handle 424 to rotate the handle forward, whereby the hopper support base 404 can be tilted with respect to the movable support base 408 as shown in fig. 47.

(3 rd shelf unit 500)

As shown in fig. 49 and 50, the 3 rd shelf unit 500 includes a hopper 502, a movable support block 504, a support arm 506, and a fixed support block 508. The fixed mount 508 of the 3 rd shelf unit 500 is fixed to the chassis unit 4 by screw fixation. In the 3 rd pallet unit 500, the user can tilt the hopper 502 with respect to the fixed support 508 as shown in fig. 50 by tilting the movable support 504 with respect to the fixed support 508.

The hopper 502 has a box shape with an upper opening. As shown in fig. 51, moveable support block 504 includes a base plate 510, a base tube 512, an upper side frame 514, a lower side frame 516, a handle 518, and a latch mechanism 520. The base plate 510, the base pipe 512, the upper side frame 514, and the lower side frame 516 are all made of steel. The base plate 510 is disposed along the front-rear direction and the left-right direction. The base pipe 512 extends along a lower surface of a front lower portion of the hopper 502, and extends in a front-rear direction along a lower surface of the base plate 510. The base pipe 512 is screw-fixed to the front lower portion of the hopper 502, and screw-fixed to the base plate 510. The upper frame 514 is disposed between the lower surface of the rear lower portion of the hopper 502 and the upper surface of the base plate 510 in the front-rear direction and the up-down direction. The upper frame 514 is screw-fixed to the rear lower portion of the hopper 502, and screw-fixed to the base plate 510. The lower side frame 516 extends in the front-rear direction along the lower surface of the base plate 510. The lower frame 516 is welded to the base plate 510. The handle 518 is disposed at a position rearward of the hopper 502. The handle 518 is threadably secured to the lower frame 516. The latch mechanism 520 is disposed below the handle 518. Latch mechanism 520 is secured to base plate 510 and lower side frame 516.

The fixed mount 508 includes a right channel 522, a left channel 524, a front side panel 526, a rear side panel 528, a reinforcement frame 530, and a latch receiver 532. The right side channel 522, left side channel 524, front side panel 526, rear side panel 528, and reinforcing frame 530 are all made of steel. The right side channel 522 and the left side channel 524 extend in the front-to-rear direction. The right side groove shelf 522 has a sectional shape opening toward the left side, and the left side groove shelf 524 has a sectional shape opening toward the right side. The front side plate 526 is welded to the front end of the right side channel 522 and the front end of the left side channel 524, respectively. The rear side plate 528 is welded to the rear end of the right side channel 522 and the rear end of the left side channel 524, respectively. As shown in fig. 49 and 50, the 3 rd shelf unit 500 is fixed to the chassis unit 4 by screwing the front side plate 526 to the right and left brackets 164 and 170 of the front wheel unit 12 and screwing the rear side plate 528 to the frame plate 130 of the chassis frame 10. As shown in fig. 51, the reinforcing frame 530 extends in the left-right direction, is welded at the right end to the right-side channel 522, and is welded at the left end to the left-side channel 524. The latch receiver 532 is secured near the center of the rear side plate 528. The latch receiver 532 is disposed at a position corresponding to the latch mechanism 520 of the movable support base 504. When the movable support base 504 is tilted with respect to the fixed support base 508 in a direction such that the rear end of the movable support base 504 approaches the rear end of the fixed support base 508, the latch mechanism 520 engages with the latch receiver 532. The latch mechanism 520 includes a latch release knob 520a. When the user operates the latch release knob 520a in a state where the latch mechanism 520 is engaged with the latch receiver 532, the engagement between the latch mechanism 520 and the latch receiver 532 is released.

The upper end of the support arm 506 is rotatably coupled to the vicinity of the front end of the lower frame 516 of the movable support 504 with the left-right direction as a rotation axis. The support arm 506 is made of steel. The lower end of the support arm 506 is provided with rollers 506a, 506b. The rollers 506a, 506b are held to a right side channel 522 and a left side channel 524 of the fixed support 508.

From the state shown in fig. 49, the user operates the latch release knob 520a to release the engagement between the latch mechanism 520 and the latch receiver 532, and further, the user holds the handle 518 to rotate it forward, whereby the movable support base 504 can be tilted with respect to the fixed support base 508 as shown in fig. 50.

(4 th shelf unit 600)

As shown in fig. 52 and 53, the 4 th shelf unit 600 includes a shelf 602, a movable support 604, a support arm (not shown), and a fixed support 606. The fixing support 606 of the 4 th shelf unit 600 is fixed to the chassis unit 4 by screw fixation. In the 4 th pallet unit 600, the user can tilt the pallet 602 with respect to the fixed support 606 by tilting the movable support 604 with respect to the fixed support 606.

The shelf 602 includes a main frame 608, a right side rail 610, a left side rail 612, and a front side rail 614. The main frame 608 includes a frame tube 616, a bottom tube 618, a stiffening tube 620, a right side rail retention tube 622, a left side rail retention tube 624, and a front side rail retention tube 626. The frame tube 616, the bottom tube 618, the reinforcement tube 620, the right side rail retention tube 622, the left side rail retention tube 624, and the front side rail retention tube 626 are all made of steel. The frame tube 616 is formed in a substantially rectangular shape having a long side direction in the front-rear direction and a short side direction in the left-right direction. The bottom tube 618 extends in the front-rear direction in substantially the same plane as the frame tube 616, and the front and rear ends of the bottom tube 618 are welded to the frame tube 616. The reinforcement pipe 620 extends in the left-right direction along the lower surface of the frame pipe 616 and the lower surface of the bottom pipe 618, and is welded to the frame pipe 616 and the bottom pipe 618. The right side rail holding pipe 622 extends in the left-right direction along the lower surface of the frame pipe 616 and the lower surface of the bottom pipe 618 near the right end of the main frame 608, and is welded to the frame pipe 616 and the bottom pipe 618. The left side rail holding tube 624 extends in the left-right direction along the lower surface of the frame tube 616 and the lower surface of the bottom tube 618 near the left end of the main frame 608, and is welded to the frame tube 616 and the bottom tube 618. The front side rail holding tube 626 extends in the front-rear direction along the lower surface of the bottom tube 618 near the front end of the main frame 608, and is welded to the bottom tube 618. A hook 616a protruding downward is provided on the lower surface of the frame tube 616. When the user is engaged with the rope of the cargo system placed on the shelf 602, the user can hook the rope to the hook 616a.

The right side rail 610 includes a protective tube 628 and an insertion tube 630. The protective tube 628 and the insertion tube 630 are both made of steel. The protection tube 628 is formed in a substantially rectangular shape having a long side direction in the front-rear direction and a short side direction in the up-down direction. The insertion tube 630 extends in the left-right direction, and the right end of the insertion tube 630 is welded to the lower portion of the protection tube 628. The right side rail 610 is held to the main frame 608 by inserting the insertion tube 630 into the right side rail holding tube 622. The right side guard rail holder pipe 622 is provided with a clamp bolt 622a for fixing the position of the insertion pipe 630 with respect to the right side guard rail holder pipe 622. The user can fix the right side rail 610 to the main frame 608 at a desired position by adjusting the position of the right side rail 610 in the left-right direction with respect to the main frame 608 with the clamp bolt 622a loosened and then tightening the clamp bolt 622a.

The left side rail 612 includes a protective tube 632 and an insertion tube 634. The protection tube 632 and the insertion tube 634 are both made of steel. The protection tube 632 is formed in a substantially rectangular shape having a long side direction in the front-rear direction and a short side direction in the up-down direction. The insertion tube 634 extends in the left-right direction, and the left end of the insertion tube 634 is welded to the lower portion of the protection tube 632. The left side rail 612 is held to the main frame 608 by inserting the insertion tube 634 into the left side rail holding tube 624. The left side guard rail holding tube 624 is provided with a clamp bolt 624a that fixes the position of the insertion tube 634 relative to the left side guard rail holding tube 624. The user adjusts the position of the left rail 612 in the left-right direction with respect to the main frame 608 in a state where the clamp bolt 624a is loosened, and then tightens the clamp bolt 624a, whereby the left rail 612 can be fixed to the main frame 608 at a desired position.

The front side rail 614 includes a protective tube 636 and an insertion tube 638. Both the protective tube 636 and the insertion tube 638 are made of steel. The protection tube 636 is formed in a substantially rectangular shape having a long side direction in the left-right direction and a short side direction in the up-down direction. The insertion tube 638 extends in the front-rear direction, and a front end of the insertion tube 638 is welded to a lower portion of the protection tube 636. The front side rail 614 is held to the main frame 608 by inserting the insertion tube 638 into the front side rail holding tube 626. The front side guardrail holding pipe 626 is provided with a clamp bolt 626a that fixes the position of the insertion pipe 638 with respect to the front side guardrail holding pipe 626. The user adjusts the position of the front side rail 614 with respect to the front-rear direction of the main frame 608 in a state where the clamp bolt 626a is loosened, and then tightens the clamp bolt 626a, whereby the front side rail 614 can be fixed to the main frame 608 at a desired position.

The movable support 604 includes a base plate 640, a lower frame 642, a handle 644, and a latch mechanism 646. The base plate 640, lower frame 642, handle 644, and latch mechanism 646 are configured identically to the base plate 510, lower frame 516, handle 518, and latch mechanism 520 of the 3 rd shelf unit 500. The reinforcing tube 620 of the main frame 608 is screw-fastened to the base plate 640.

The fixed mount 606 includes a right channel 648, a left channel 650, a front side plate 652, a rear side plate 654, a reinforcement frame 656, and a latch receiver 658. The structure of the fixed support block 606 is the same as the structure of the fixed support block 508 of the 3 rd shelf unit 500. The connection form between the movable mount 604 and the fixed mount 606 is the same as the connection form between the movable mount 504 and the fixed mount 508 of the 3 rd shelf unit 500. That is, most of the components of the 4 th shelf unit 600 are common to most of the components of the 3 rd shelf unit 500. In the 4 th shelf unit 600, as in the 3 rd shelf unit 500, the user operates the latch release knob 646a to release the engagement between the latch mechanism 646 and the latch receiver 658, and further rotates the handle 644 forward, from the state shown in fig. 52, whereby the movable support 604 can be tilted with respect to the fixed support 606.

(5 th shelf unit 700)

As shown in fig. 54 and 55, the 5 th shelving unit 700 includes a hopper 702 and a cradle 704. The abutment 704 of the 5 th shelf unit 700 is fixed to the chassis unit 4 by screw fastening. In the 5 th pallet unit 700, the hopper 702 is not fixed to the support base 704, and the user can mount the hopper 702 on the support base 704 or lift the hopper 702 up and detach the hopper 702 from the support base 704.

As shown in fig. 54, the hopper 702 has a box shape with an upper opening. A through hole 702a is formed in a lower portion of a front surface of the hopper 702. A cover 706 is detachably attached to the through hole 702a.

As shown in fig. 55, the bearing block 704 includes a center frame 708, a right channel 710, a left channel 712, a front side panel 714, a rear side panel 716, a right side rail 718, and a left side rail 720. The center frame 708, right side channel 710, left side channel 712, front side panel 714, and rear side panel 716 are all made of steel. The center frame 708, the right side channel frame 710, and the left side channel frame 712 extend in the front-rear direction. The front side plate 714 is welded to the front end of the center frame 708, the front end of the right side channel 710, and the front end of the left side channel 712, respectively. The rear side plate 716 is welded to the rear end of the center frame 708, the rear end of the right side channel 710, and the rear end of the left side channel 712, respectively. As shown in fig. 54, the 5 th shelf unit 700 is fixed to the chassis unit 4 by screwing the front side plate 714 to the right and left brackets 164, 170 of the front wheel unit 12 and screwing the rear side plate 716 to the frame plate 130 of the chassis frame 10.

The right side rail 718 includes a protective tube 722 and a reinforcement tube 724. The protection pipe 722 and the reinforcement pipe 724 are both made of steel. The protection pipe 722 extends in the front-rear direction along the right side surface of the hopper 702. The protection pipe 722 is bent leftward and downward along the front surface of the hopper 702 at the front end of the hopper 702, connected to the front side plate 714, and bent leftward and downward along the rear surface of the hopper 702 at the rear end of the hopper 702, connected to the rear side plate 716. Reinforcing tube 724 connects protective tube 722 with right channel 710.

As shown in fig. 55, the left side rail 720 includes a protective tube 726 and a reinforcing tube 728. The protective tube 726 and the reinforcing tube 728 are both made of steel. The protection pipe 726 extends in the front-rear direction along the left side surface of the hopper 702. The protection pipe 726 is bent rightward and downward along the front surface of the hopper 702 at the front end of the hopper 702, connected to the front side plate 714, and bent rightward and downward along the rear surface of the hopper 702 at the rear end of the hopper 702, connected to the rear side plate 716. Reinforcing tube 728 connects protective tube 722 to left channel 712.

As described above, in one or more embodiments, the truck 2 (an example of a work machine) includes: a battery box 8; and a battery pack 112 (an example of a battery) detachably attached to the battery box 8. The battery box 8 includes: a top cover 102; and a battery cover 106 having a shape covering a battery pack 112 attached to the battery case 8 and rotatable about a rotation axis with respect to the top cover 102. In the carrier 2, when the battery box 8 is viewed from above in an open state in which the battery cover 106 is opened, the battery cover 106 and the top cover 102 overlap at least partially. In the carrier 2, when the battery box 8 is viewed from above in a closed state in which the battery cover 106 is closed, the battery cover 106 and the top cover 102 overlap at least partially.

According to the above configuration, in both the open state in which the battery cover 106 is opened and the closed state in which the battery cover 106 is closed, when the battery case 8 is viewed from above, the battery cover 106 and the top cover 102 partially overlap, and therefore, even when water is sprayed onto the battery case 8 from above, water can be prevented from entering from the gap between the battery cover 106 and the top cover 102. It is possible to prevent water from being sprayed onto the battery pack 112 mounted to the battery box 8.

In one or more embodiments, in the carrier 2, when the battery box 8 is viewed from above in an open state, the battery pack 112 attached to the battery box 8 and the battery cover 106 overlap.

According to the above configuration, since the battery cover 106 also covers the upper side of the battery pack 112 in the open state in which the battery cover 106 is opened, even when water is sprayed onto the battery box 8 from above, water can be prevented from being sprayed onto the battery pack 112.

In one or more embodiments, a concave surface 106h (an example of a concave portion) extending along the rotation axis is formed in an upper portion of the battery cover 106.

According to the above structure, water attached to the upper portion of the battery cover 106 can be guided by the concave surface 106h to flow along the outer surface of the battery cover 106, and thus water can be prevented from being sprayed onto the battery pack 112.

In one or more embodiments, the battery case 8 further includes a water receiving portion 110b, and the water receiving portion 110b is disposed in the battery case 8 above the battery pack 112.

According to the above configuration, even when water that has been poured onto the battery case 8 from above enters the inside of the battery case 8, water can be received by the water receiving portion 110b, and therefore water can be prevented from being poured onto the battery pack 112.

In one or more embodiments, the upper surface of the top housing 102 and the upper surface of the battery housing 106 are inclined relative to the horizontal.

According to the above configuration, when water is poured onto the battery box 8 from above, the water can be dropped downward along the upper surface of the top cover 102 and the upper surface of the battery cover 106.

In one or more embodiments, the battery pack 112 can also be used in other electrical devices.

With the above configuration, the battery pack 112 can be shared with the carrier 2 and other electrical equipment, and the convenience of the user can be improved.

(modification)

In the above embodiment, the carrier 2 is described as an example of the working machine, but the working machine may be another type of working machine such as a mower, a cultivator, a high-pressure cleaner, a power cutter, and a chain saw. For example, the work machine may be a mower 902 shown in fig. 65. Mower 902 includes wheels 904 that contact the ground and a grip 906 that is gripped by a user, and mower 902 is pushed forward by the user gripping grip 906 with both hands, so that mower 902 is moved forward. The mower 902 includes a motor (not shown) that rotates a cutter (not shown) that cuts the lawn. The motor is driven by electric power supplied from the battery pack 908. The battery pack 908 is detachably attached to the battery box 910. The battery case 910 includes: a top cover 912; and a battery cover 914 that is attached to the top cover 912 so as to rotate about the rotation shaft 912a with respect to the top cover 912. The battery cover 914 is opened by rotating in the direction of the arrow of fig. 65. The battery cover 914 has a shape that covers the battery pack 908 mounted to the battery case 910 in a closed state. When the battery case 910 is viewed from above in a closed state in which the battery cover 914 is closed, the battery cover 914 and the top cover 912 partially overlap, and the battery cover 914 and the battery pack 908 also partially overlap. When the battery case 910 is viewed from above in an open state in which the battery cover 914 is opened, the battery cover 914 and the top cover 912 partially overlap.

Alternatively, work machine may be mower 922 shown in fig. 66. Mower 922 includes wheels 924 that contact the ground and a handle 926 that is held by a user, and mower 922 is pushed forward by the user holding handle 926 with a single hand, so that mower 922 is moved forward. Mower 922 includes a motor (not shown) that rotates a grass cutting blade 928. The motor is driven by electric power supplied from the battery pack 930. The battery pack 930 is detachably attached to the battery case 932. The battery case 932 includes: a top cover 934; and a battery cover 936 rotatably attached to the top cover 934 about a rotation shaft 934a with respect to the top cover 934. The battery cover 936 is opened by rotating in the direction of the arrow of fig. 66. The battery cover 936 has a shape that covers the battery pack 930 mounted to the battery case 932 in a closed state. When the battery case 932 is viewed from above in a closed state in which the battery cover 936 is closed, the battery cover 936 and the top cover 934 partially overlap, and the battery cover 936 and the battery pack 930 also partially overlap. When the battery case 932 is viewed from above in an open state in which the battery cover 936 is opened, the battery cover 936 and the top cover 934 partially overlap.

Alternatively, the work machine may be a power cutter 942 as shown in fig. 67. The power cutter 942 includes a front grip 944 for a user to hold with one hand and a rear grip 946 for the user to hold with the other hand, and the power cutter 942 cuts a workpiece by rotation of the disc blade 948. The power cutter 942 includes a motor (not shown) that rotates the disc blade 948. The motor is driven by electric power supplied from the battery packs 950, 952. The battery packs 950 and 952 are detachably attached to the battery case 954. The battery case 954 includes: a top cover 956; a battery cover 958 rotatably attached to the top cover 956 about a rotation shaft 956a with respect to the top cover 956; and a battery cover 960 attached to the top cover 956 so as to be rotatable about the rotation shaft 956b with respect to the top cover 956. The battery covers 958, 960 are opened by rotating in the direction of the arrow of fig. 67. The battery cover 958 has a shape that covers the battery pack 950 attached to the battery case 954 in a closed state, and the battery cover 960 has a shape that covers the battery pack 952 attached to the battery case 954 in a closed state. When the power cutter 942 is placed on the ground in a closed state in which the battery covers 958 and 960 are closed and the battery case 954 is viewed from above, the battery covers 958 and 960 and the top cover 956 partially overlap, the battery cover 958 and the battery stack 950 partially overlap, and the battery cover 960 and the battery stack 952 partially overlap. When the battery case 954 is viewed from above with the battery covers 958 and 960 open and the power cutter 942 placed on the ground, the battery cover 958 and the top cover 956 partially overlap.

Alternatively, the work machine may be a high-pressure washer 962 shown in fig. 68. The high-pressure cleaner 962 includes a handle 964 for a user to hold, a water inlet 966 into which water is supplied, a water outlet 968 from which water is supplied, a pump (not shown) for pressurizing water from the water inlet 966 and delivering the water to the water outlet 968, and a motor (not shown) for driving the pump. The motor is driven by electric power supplied from the battery pack 970. The battery pack 970 is detachably attached to the battery box 972. The battery box 972 includes: a top cover 974; and a battery cover 976 rotatably attached to the top cover 974 about a rotation shaft 974a with respect to the top cover 974. The battery cover 976 is opened by rotating in the direction of the arrow of fig. 68. The battery cover 976 has a shape that covers the battery pack 970 attached to the battery case 972 in a closed state. When the high-pressure cleaner 962 is placed on the floor surface in a closed state in which the battery cover 976 is closed and the battery case 972 is viewed from above, the battery cover 976 and the top cover 974 partially overlap, and the battery cover 976 and the battery pack 970 partially overlap. When the high-pressure cleaner 962 is placed on the floor surface with the battery cover 976 opened and the battery case 972 is viewed from above, the battery cover 976 and the top cover 974 partially overlap.

Claims

1. A work machine, wherein,

the work machine includes:

a battery box; and

a battery detachably attached to the battery box,

the battery box includes:

a top cover; and

a battery cover having a shape covering the battery mounted to the battery box, the battery cover being provided with a hinge portion, the battery cover being rotatable about a rotation axis of the hinge portion with respect to the top cover,

when the battery case is viewed from above in an open state in which the battery cover is opened, the battery cover and the top cover overlap at least partially, the upper side of the hinge portion is covered by the top cover,

when the battery case is viewed from above in a closed state in which the battery cover is closed, the battery cover and the top cover overlap at least partially, and the top cover covers the upper side of the hinge.

2. The work machine of claim 1, wherein,

when the battery box is viewed from above in the open state, the battery mounted to the battery box and the battery cover overlap.

3. The work machine according to claim 1 or 2, wherein,

a concave portion extending along the rotation axis is formed at an upper portion of the battery cover,

The hinge portion is disposed in the recess.

4. The work machine according to claim 1 or 2, wherein,

the battery box further includes a water receiving portion disposed in the battery box at a position above the battery.

5. The work machine according to claim 1 or 2, wherein,

the upper surface of the top cover and the upper surface of the battery cover are inclined with respect to a horizontal plane.

6. The work machine according to claim 1 or 2, wherein,

the battery can also be used in other electrical devices.